15
`
`EP0763936A2
`
`16
`
`the reproducible
`the reproducible number at
`137)
`number field ior limiting the number oi reproduction oi
`copied programs oi the CPTC iniorrnation. the maxi-
`mum reproducible time oi the maximum reproducible
`time iield ior limiting lime to reproduce the copied pro-
`gram. and the number and lime oi reproduction oi tape.
`to thereby process reproduction-impossible.
`The copying number limiting step comprises the
`steps oi: comparing (130) the permissible generation oi
`the permissible generational field and the present gen-
`eration oi the present generational field and deciding
`whether the permissible generation is below the present
`generation; ii the permissible generation is below the
`present generation, generating (131) an output disable
`signal to make. copying impossible and destroying the
`control word; and ii the permissible generation is not be-
`iowthe present generation. increasing (1 32) the present
`invention by '1' and recording the result on cassette
`tape, and it the permissible generation is not below the
`present generation, updating the CPTC iniorrnation in
`step 133.
`The reproduction limiting step comprises the steps
`oi: comparing the reproducible number oi the reproduc-
`ible number field and the reproduction number oi tape
`and deciding (134) whether the reproducible number is
`below the reproduction number oi tape; ii the reproduc-
`ible number is not below the reproduction number oi
`tape. comparing the maximum reproducible time and re
`production time oi tape. and deciding (135) whether the
`maximum reproducrble time is below the reproduction
`time oi tape; it the maximum reproducible time is not
`below reproduction time oi tape. turning oil (136) an en-
`able erase signal to thereby enable the copied program
`to be reproduced; ii the reproducible number is below
`the reproduction number oi tape or the maximum repro-
`ducible time is below the reproduction time oi tape. tum-
`ing on (137) the enable erase signal to make the repro-
`duction oi the copied program impossrble so that part oi
`or the whole program recorded on cassette tape is
`erased.
`
`The illegal view/copy protection method ior digital
`broadcasting system embodying the present invention.
`alter the audiolvideo signal transmission step and au-
`dio/video reception step. iurther comprises a reproduc-
`tion and rerecording step oi: decrypting the bit stream
`recorded and reproduced on cassette tape. analyzing
`the CPTC iniormation, deciding whether to allow rere-
`cording. recording the result on cassette tape. filtering
`the control word, and periorming descrambling and de-
`coding to output an audio/video signal.
`Reierring to Fig. 12, the audio/video reproduction
`and rerecording step comprises the steps oi: iittering
`(120) the bit stream recorded and reproduced on video
`tape, and decrypting (121) the CPTC iniomiation; ana-
`tyzirig (122 and 123) the CPTC inionnation to generate
`control words and a signal ior controlling the protection
`oi copyright and update the CPTC iniormation; deciding
`(124) whether to allow recording according to the signal
`
`10
`
`15
`
`20
`
`25
`
`30
`
`oi controlling the protection oi copyright, and rwording
`the scrambled and transmitted bit stream on cassette
`' tape; descrambling and decoding (125 and 126) the
`transmitted bit stream in control words to output an au-
`dio/video signal: and deciding whether to allow post-re—
`production according to the signal Ior controlling the pro-
`tectionoi copyright to thereby erase part at or the whole
`data recorded on cassette tape.
`.
`Here, EMM may contain inlorrnation required ior
`decoding iniormation in order to periorm the illegal view/
`copy protection method oi a broadcasting system. In this
`case. a step oi storing and processing the EMM is added
`in the audidv'tleo reproduction and rerecording step.
`In the EMM storing and processing step. in case
`that the EMM is updated by a broadcasting station lor
`the purpose oi copyright protection, the EMM having in-
`ion'nation required to decode the CPTC iniorrnation is
`stored in order to continuously reproduce programs oi
`copied cassette tape.
`Here. an ID number indicative oi updating the EMM
`is recorded on cassette tape. The EMM is stored to
`which the updating state and the ID number oi cassette
`tape are mpped.
`The EMM storing and processing step comprises
`the steps of. storing all EMM to be updated and corre-
`sponding ID iniormation; selecting the latest EMM in re-
`cording cassette tape; recording a corresponding ID
`number. and selecting an EMM corresponding to the ID
`number recorded on cassette tape in reproducing the
`cassette tape.
`As shown in Fig. 13. all EMMs (EMM1. EMMZ.
`EMMS...) to be updated on the EMM lockup table and
`corresponding ID iniormation (lDt.
`I02,
`[03,...) are
`mapped and stored.
`Ftelerring to Figs. 14 and 15. in recording a program
`on cassette tape, that is, Mien recording is indicated in
`the recording/reproduction mode, an ID number corre-
`sponding to the latest, the final, EMM,
`is recorded.
`Thereafter, it reproducing the cassette tape. that is,
`Mien reproduction is indicated in the recording/repro-
`duction mode. an EMM corresponding to the ID number
`recorded on cassette tape is selected irom the EMM
`Iookup table so that the recorded program is reproduced
`according to the reproducible number oi the reproduci-
`ble number field and the reproduction number recorded
`on the video tape.
`Fleiern'ng to Fig. 16. an illegal view/copy protection
`apparatus oi digital broadcasting system embodying the
`present invention comprises a program producing por-
`tion 200, distribution medium ponion 201. and program
`receiving portion 202.
`Program producing portion 200 otters programs. in
`which inionnation encrypted both with the control word
`ior scrambling and the CPTC iniorrnation ior prohibiting
`illegal view/copy. and the audio/video bit stream scram-
`bled in control words are multiplexed to make a pro-
`gram.
`Distribution medium ponion 201 distributes pro-
`
`Petitioner Apple Inc. - EX. 1025, p. 5001
`
`Petitioner Apple Inc. - Ex. 1025, p. 5001
`
`

`

`17
`
`EP0763936A2
`
`18
`
`grams made in program producing portion 200 through
`a transmission medium.
`
`Program receiving portion 202 detects and analyz-
`es the CPTC inlormation trom the bit stream transmitted
`trorn distribution medium portion 201 and the bit stream
`reproduced lrom Cassette tape. and descrambles and
`decodes the bit stream transmitted trorn distribution me-
`dium portion 201, The descrambled and decoded bit
`stream is displayed or recorded on cassette tape.
`Program producing portion 200 comprises a control
`word generator 203 tor generating a control word lor
`scrambling, a CPTC generator 204 lor generating the
`CPTC inlormation tor prohibiting illegal view/copy. a
`scrambling portion 206 tor scrambling the audio/video
`bit stream using the control word output lrom control
`word generator 203. an encrypting portion 205 tor en-
`crypting the control word output trom control word gen-
`erator 203 and the CPTC inlormation output lrom CPTC
`generator 204. and an adder 207 tor multiplexing the
`signals output lrom scrambling portion 206 and encrypt-
`ing portion 205 and transmitting them to distribution me-
`dium portion 201.
`Distribution medium portion 201 comprises a
`broadmsting medium 208 tor distributing the program
`made by program producing portion 200 through cable,
`satellite or terrestrial broadcasting. and a recording me-
`dium 209 lor distributing the program made by program
`producing portion 200 through cassette tape.
`Program receiving portion 202 comprises a de-
`crypting portion 210 lordecrypting the bit stream trans-
`mitted from broadcasting medium 208. a CPTC detect-
`ing/analyzing ponion 211 tor detecting and analyzing
`the CPTC inlormation trom the bit stream output tram
`decrypting portion 210 and recording medium 209. and
`outputting signals tor controlling the control word and
`illegal view/copy. a descrambling ponion 212 tor de-
`scrambling the bit stream transmitted lrom broadcasting
`medium 208 and recording medium 209 and the bit
`stream reproduced lrom cassette tape, a decoding por-
`tion 213 tor decoding and displaying the signal output
`trom descrambling ponion 212. and a recording/repro-
`ducing portion 214 lor recording the bit stream transmit-
`ted trom broadmsting medium 208 and recording me-
`dium 209 according to the signal output lrom CPTC de-
`tecting/analyzing portion 211, and reproducing cassette
`tape. to thereby output the result to descrambling por-
`tion 212 and CPTC detecting/analyzing portion 211.
`The operation oi an illegal view/copy protection ap-
`paratus tor a digital broadcasting system embodying the
`present invention will be described below.
`Control word generator 203 generates a control
`word tor scrambling, and CPTC generator 204 gener-
`ates the CPTC inlormation tor prohibiting illegal view/
`copy. Scrambling portion 206 scrambles the audio/Video
`bit stream using the generated control word. Encrypting
`ponion 205 encrypts the CPTC inlonnation output lrom
`CPTC generator 204 using the generated control word.
`The audioNideo bit stream scrambled in scrambling por-
`
`1O
`
`15
`
`20
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`25
`
`30
`
`35
`
`55
`
`10
`
`tion 206 is multiplexed with the encrypted CPTC inlor-
`mation in adder 207. The multiplexed result is transmit-
`ted to a reception port through distribution medium por-
`tion 201.
`The signal output trom adder 207 is transmitted to
`program receiving portion 202 through broadcasting
`medium 208 such as cable. satellite, and 1errestrial
`broadcastings. or through recording medium 209 made
`ot cassette tape such as rental tape.
`The bit stream transmitted through broadcasting
`medium 208 is decrypted in decrypting portion 210. The
`CPTC inlormation is detected and analyzed in CPTC
`detecting/analyzing portion 211 so that signals tor con-
`trolling the control word and illegal view/copy are output.
`Here, the bit stream transmitted to cassette tape through
`recording medium 209 is reproduced in recording/repro-
`ducing ponion 214 and input to descrambling portion
`212 and CPTC detecting/analyzing portion 211. The bit
`stream transmitted lrorn broadcasting medium 208 and
`the bit stream reproduced lrom recording medium 209
`through recording/reproducing portion 214 are de-
`scrambled in descrambling portion 212 according to the
`control word output trom C PTC detecting/analyzing por-
`tion 211. The signal output lrom descrambling portion
`212 is decoded in decoding portion 213 and displayed.
`The bit stream transmitted lrorn broadcasting medium
`208 and recording medium 209 is recorded on cassette
`tape in a recordinglreproducing portion 214 according
`to the signal output lrom CPTC detectinglanalyzing por-
`tion 211.
`
`Data received lrom program receiving portion 202
`and recorded on cassette tape is made up of the scram-
`bled audio/video bit stream and CPTC inlormation. The
`configuration ol the program receiving portion having
`decrypting portion 210. CPTC detecting/analyzing por-
`tion 211, descrambling portion 212, decoding ponion
`213 and recording/reproducing portion 214 will be ex—
`plained with relerence to Figs, 17, 18, 19, and 20.
`One embodiment oi the program receiving portion
`at Fig. 17 receives and processes data transmitted via
`a broadcasting medium. Specifically, this embodiment
`pertorms conditional access and copy protection.
`Fleterring to Fig. 17. the first embodiment ot the pro-
`gram receiving portion comprises an IRD 222 tor receiv-
`ing, decoding and descrambling the bit stream transmit-
`ted lrom broadcasting medium 208. outputting analog
`audio/Video data to be displayed and outputting scram-
`bled digital audio/video data to be recorded on cassette
`tape. a smart card 221 tor decrypting the bit stream out-
`put trom IRD 222. detecting/analyzing the CPTC inlor-
`mation, and outputting the control word and signals tor
`controlling illegal view/copy to IRD 222 in order to per-
`torm conditional access and copy protection, a DVCR
`223 tor recording the digital audio/video data and CPTC
`inlormation scrambled and output trom IRD 222 on cas-
`sette tape. and reproducing the scrambled digital audio!
`video data and CPTC inlormation recorded on cassette
`tape to be output to IFlD 222, and a lockup table 224 tor,
`
`Petitioner Apple Inc. - EX. 1025, p. 5002
`
`Petitioner Apple Inc. - Ex. 1025, p. 5002
`
`

`

`19
`
`EP0763936A2
`
`20
`
`in case that the EMM is updated by a broadcasting sta-
`tion tor the purpose of copyright protection. storing EMM
`having inlormation required to decode the CPTC inlor-
`mation. and outputting CPTC inlormation correspond-
`ing in reproduction to smart card 22t in order to contin-
`uously reproduce the program at copied cassette tape.
`Here. lockup table 221 is mapped and processed as
`shown in Figs. 13. 14 and 15.
`The operation ot the first embodiment ot the pro-
`gram receiving ponion will be described below.
`In case that a bit stream. that is. a program, is re-
`ceived through a broadcasting medium. the received
`audio/video data is scrambled digital audio/video data.
`The received bit stream is decoded in IFID 222 and
`decrypted in sman card 221. Its CPTC inlormation is de-
`tected and analyzed so that a signal tor controlling the
`control word and illegal view/copy is output to IRD 222.
`IFID 222 descrambles the decoded bit stream using
`the bit stream output Irom sman card 22t and signals
`tor controlling illegal view/copy. The descrambled bit
`stream is output to display analog audio/video data. IFtD
`222 outputs the scrambled digital audio/Video data and
`CPTC inlormation to DVCT 223 in order to record them
`on cassette tape.
`The scrambled digital audidvideo data and CPTC
`inlormation output lrom IFtD 222 is recorded on cassette
`tape in DVCFt 223. They are in turn reproduced in DVCFt
`223 and processed in the same manner that the bit
`stream transmitted via the broadcasting medium is de-
`scrambled and processed in IFID 222 and smart card
`221. The processed result is output to be displayed on
`a monitor. or output to the DVCFt and recopied.
`Here= reproduction and recopy are made possible
`by the data stored in the permissible generational tield.
`present generational field. reproducible number field.
`and maximum reproducible time field contained in the
`CPTC inlormation.
`Updated EMM is mapped and stored in lookup table
`224 so that. when the EMM is updated through a broad-
`casting signal in a broadcasting station in order to pro-
`tect copyright. the program 01 cassette tape copied can
`be continuously reproduced.
`Lookup table 224 reads out the EMM containing in-
`lormation required to decode the CPTC inlormation in
`reproducing the cassette tape. Corresponding CPTC in-
`Iorrnation is output to sman card 221 to enable repro-
`duction.
`
`Another embodiment ot the program receiving por~
`tion shown in Fig. 18 is to receive and process data
`transmitted through a recording medium. tor instance.
`rental tape.
`The second embodiment of the program receiving
`ponion. as shown in Fig. 18. comprises a DVCH 232 Ior
`detecting/analyzing the CPTC inlormation Irom the bit
`stream transmitted trom the recording medium. output-
`ting a control word and signals for controlling illegal
`view/copy. and reproducing scrambled digital audio/Vid-
`eo data. and an lFID 231 tor receiving the control word
`
`'0
`
`15
`
`20
`
`25
`
`35
`
`40
`
`IT
`
`and signals tor controlling illegal view/copy output trom
`DVCFt 232. descrambling the scrambled digital audio!
`video data. and outputting analog audio/Video data to
`be displayed or recorded.
`The swond embodiment ot the program receiving
`portion is to pertorm CPTC detection and processing
`carried out in the smart card 01 the lirst embodiment ot
`the program receiving portion shown in Fig. 17. The op-
`eration ot the second embodiment oi the program re-
`ceiving portion will be described below.
`In use that the bit stream is received through the
`recording medium,
`the audio/video data reproduced
`through the Oven is scrambled digital audioNideo data.
`The bit stream recorded in DVCFi 232 is repro-
`duced Its CPTC inlormation is detected and analyzed
`so that the control word and signal tor controlling illegal
`view/copy is output to IFtD 231. The bit stream repro-
`duced Irom DVCFt 232 is decoded in IFID 231. The de-
`coded bit stream is descrambled according to the con-
`trol word and signal tor controlling illegal view/copy out-
`put trom DVCFt 232 so that analog audio/video data is
`output to be displayed.
`IFID 231 outputs the scrambled digital audio/video
`data and CPTC inlormation to DVCFi 232 to record them
`on cassette tape. The scrambled digital audioNideo da-
`ta and CPTC intorrnation output trom lFlD 231 is record-
`ed cn cassette tape and recopied in DVCFi 223.
`Here. reproduction and recopy are made possible
`by the data stored in the permissible generational field.
`present generational field. reproducmle number field.
`and maximum reproducible time Iield contained in the
`CPTC inlormation.
`Reterring to Fig. 19. still another embodiment ot the
`program receiving portion is to receive and process data
`transmitted through a recording medium. pertorming
`copy protection (CP).
`As shown in Fig. 19. the third embodiment ot the
`program receiving ponion comprises a DVCR 243 tor
`reproducing the scrambled digital audioNideo data and
`CPTC intonnaticn recorded on cassette tape through a
`recording medium. and outputting them to IFlD 242, an
`IFtD 242tor decoding/descrambling the bit stream trans-
`mitted Irom DVCFt 243. and outputting analog audio/vid-
`eo data to be displayed. and a smart card 241 for de-
`crypting the bit stream output trom IFtD 242. detectth
`analyzing the CPTC. and outputting the control word
`and signals Iorcontrotling copying to IFtD 222 to thereby
`perlorrn CP. The operation 01 the third embodiment ot
`the program receiving ponion will be explained below.
`In case that the bit stream is received via a record-
`ing medium. that is. through rental tape. the reproduced
`audio/Video data is scrambled digital audio/video data.
`The scrambled digital audio/video data and CPTC
`inlormation reproduced Irom DVCR 243 are decoded in
`IFtD 242 and decrypted in sman card 241. The CPTC
`inlormation is detected and analyzed so that the control
`word and signal tor controlling copying are output to I RD
`242.
`
`Petitioner Apple Inc. - EX. 1025, p. 5003
`
`Petitioner Apple Inc. - Ex. 1025, p. 5003
`
`

`

`21
`
`EP0763936A2
`
`22
`
`IFtD 242 descrambles the decoded bit stream using
`the CPTC inlorrnation output trorn smart card 241 and
`signals for controlling copying so that analog audio/vid-
`eo data is output to be displayed.
`'
`IRD 242 outputs the scrambled digital audio/Video
`data and CPTC intormation to DVCFt 243 in order to
`record them on cassette tape. The scrambled digital au-
`dio/video data and CPTC information output from IFtD
`242 are recorded on cassette tape in DVCFl 243.
`Here. reproduction and recopy are made possible
`by the data stored in the permissible generational field.
`present generational field. reproducible number field.
`and maximum reproducible time field contained in the
`CPTC intormation.
`Fteierring to Fig 20. yet another embodiment of the
`program receiving portion is to receive and process data
`transmitted through a recording medium. pertorming
`conditional access and CP. This embodiment is made
`in such a manner that in case of using the same CPTC
`information as the broadcasting medium. the smart card
`is commonly used.
`As shown in Fig. 20. the fourth embodiment of the
`program receiving portion comprises a DVCR 253 tor
`reproducing the scrambled digital audio/video data and
`CPTC information recorded on cassette tape through a
`recording medium. and outputting them to IFtD 252, an
`lFtD 252 lordecoding/descrambling the bit stream trans-
`mined from DVCFl 253. and outputting analog audio/vid-
`eo data to be displayed. and a smart card 251 for de-
`crypting the bit stream output from lFtD 252. detecting/
`analyzing the CPTC. and outputting the control word
`and signals for controlling copying to lFtD 252 to thereby
`perform CA and CP, The operation of the third embodi-
`ment of the program receiving portion will be explained
`below.
`in case that the bit stream is received via a record-
`ing medium. that is. through rental tape and the DVCFl.
`the reproduced audio/video data is scrambled digital au-
`dio/video data.
`The scrambled digital audio/video data and CPTC
`inlorrnation reproduced from DVCR 253 are decoded in
`IRD 252 and decrypted in srnart card 251. The CPTC
`information is detected and analyzed so that the control
`word and signal for controlling copying are output back
`to 180 252.
`
`lFlD 252 descrambles the decoded bit stream using
`the CPTC information output from smart card 251 and
`signals for controlling illegal view/copy so that analog
`audio/video data is output to be displayed
`IRD 252 outputs the scrambled digital audio/video
`data and CPTC inforrnaticn to DVCFt 253 in order to
`record them on cassette tape. The scrambled digital au-
`dio/video data and CPTC information output from IFtD
`222 are recorded on cassette tape in DVCFl 253.
`Here. reproduction and recopy are made possible
`by the data stored in the permissible generational field.
`present generational field. reproducible number field.
`and maximum reproducible time field contained in the
`
`CPTC intormation.
`
`1RD 222, 242. or 252 shown in Fig. 17, 19 or 20 is
`made in the following configuration as shown in Fig. 21.
`Ftelerring to Fig. 21. IFlD 222. 242 or 252 comprises
`a recording/digital output controller 262for decoding the
`bit stream transmitted from the broadcasting medium
`and DVCR. outputting to smart card 221, receiving the
`control word and signals tor controlling illegal view/copy
`output from smart card 221. and controlling the output
`of the scrambled digital audio/video data for the purpose
`at recording and displaying; a descrambler 263 for de-
`scrambfing the scrambled digital audio/video data out-
`put from recording/digital output controller 262 accord—
`ing to the control word output from recording/digital out-
`put controller 262. and a display processing portion 264
`for processing and outputting the digital audio/Video da-
`ta output from descrambler 263 to be displayed. Here.
`DVCR 265 performs reproduction mainly. DVCR 223 of
`the program receiving portion of Fig. 18 combines re-
`cording therewith. The operation of IFtD 266 will be de-
`scribed below.
`
`The signal output to smart card 261 from recording!
`digital output controller 262 ct IFtD 266 is ECM. EMM
`and CPTC information. The signals output from smart
`card 261 to IRD 266 are the control word used to de-
`scramble and display the bit stream, and a signal for
`controlling copy protection.
`Recording/digital output controller 262 communi-
`cates with the smart card. performs recording according
`to the signals at copy protection. outputs them to the
`digital output port in order to record them in another set.
`and outputs the control word and bit stream to descram-
`bler 263.
`
`When output to the recording/digital output port. up-
`dated ECM. EMM and CPTC information are output in
`addition to the scrambled data from recording/digital
`output controller 262 so that a copy difterent from the
`original script, that is. the broadcast or rental tape.
`The ECM. EMM and CPTC are transmitted in vari.
`ous combinations. For the first combination, the ECM.
`EMM and CPTC are independently combined, The sec-
`ond combination is that the CPTC is included in the ECM
`and the EMM is independently combined. The third is
`that the CPTC is included in the EMM and the ECM is
`independently combined.
`tFtD 23t and DVCFl 232 of Fig. 16 use the smart
`card. and additionally requires a CPTC detection and
`processing portion in the DVCFl. which will be shown in
`Fig. 22.
`DVCFl 232 comprises a CPTC detecting/process-
`ing portion 276 for detecting/analyzing the CPTC infor-
`mation from the bit stream transmitted from recording
`medium 209. and outputting the control word and sig-
`nals tor illegal view/copy. and a reproducing portion 277
`for reproducing the bit stream transmitted from record-
`ing medium 209 and outputting it to the IRD.
`lFlD 231 comprises a digital output controller 272
`for receiving the control word and signals for controlling
`
`5
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`40
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`45
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`55
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`12
`
`Petitioner Apple Inc. - EX. 1025, p. 5004
`
`Petitioner Apple Inc. - Ex. 1025, p. 5004
`
`

`

`23
`
`EP 0 763 936 A2
`
`24
`
`illegal view/copy output lrorn CPTC detecting/process-
`ing portion 276. and controlling the output ol the scram
`bled digital audio/video data output lror'n reproducing
`portion 277 in order to display them, a descrambler 273
`lor descrambling the scrambled digital audio/Video data
`output lrorn digital output controller 262 according to the
`control word output lrom digital output controller 262.
`and a display processing portion 274 lor processing and
`outputting the digital audio/Video data output lrorn de-
`scrambler 273 in order to display them. The operation
`ol lRD 276 and DVCFl 275 will be described below.
`CPTC detecting/processing portion 276 operates
`separately when reproducing portion 277 reproduces
`the scrambled data so that the CPTC inlormation is de-
`tected Iran the cassette tape.
`lFtD 276 receives the scrambled data. CPTC inlor-
`mation and control word lrom CPTC detecting/process-
`ing portion 276 and reproducing portion 277 lrom DVCFl
`275. Therelore. lor normal descrambling. the scrambled
`data and control word are supplied to scrambler 273
`lrom digital output controller 272. To the digital output
`port. only the scrambled data is output. For this reason.
`in case that the reproduced data is scrambled. copying
`is made impossible, and vise versa.
`Commonly.
`in order to control tape copying. the
`depth ol generation copy and the reproduction ol tape
`to be copied are used together. As shown in Fig. 7. this
`yields the eilect at controlling the number ol copiable
`tape.
`However. in order to allow copying tape to be repro-
`ducible as many as a predetermined number or lor a
`predetermined time. it is necessary to pertorm commu-
`nication between the smart card and DVCFl.
`Ftelerring to Fig. 23. tape state inlorrnation such as
`the reproduction number at the current tape is transmit-
`ted to smart card 261 trom DVCR 265. In order to erase
`the tape. an enable erase signal is transmitted to DVCR
`265 lrorn sman card 261, and the erase head at the
`DVCR operates.
`For tape erasing methods. the whole area ol tape
`is erased by the lull-width erase head. or only the control
`track is erased using the control head. in case that the
`CPTC is contained in the EMM, signals are input and
`output between the DVcFl and sman card.
`As the signals input to lFtD 266. there are a broad-
`casting signal transmitted lrom a broadcasting medium
`and a signal reproduced lrom DVCR 265. The broad-
`casting signal input to lFlD 266 is the scrambled digital
`data and a control signal having the EMM. ECM and
`CPTC inlorrnation. The EMM and ECM are required lor
`CA. the CPTC lor copyright protection.
`The scrambled digital data is input to descrambler
`263. The control signal is input to smart card 261 lor
`performing CA and CP. Using the control signal, smart
`card 261 restores control word CW and outputs it to de-
`scrambler 263. Descrambler 263 descrambles it using
`the control word.
`
`The ECM output lrorn smart card 261 is output to
`
`DVCR 265 or to an external port. This ECM is updated
`lror'n the ECM input lor copyright protection. The output
`disable signal output lrorn sman card 261 'e a signal to
`instruct lFlD 266 to prohibit recording or copying. This
`signal is input to recording/digital output controller 262.
`The tape state signal is output to smart card 261 lrom
`DVCR 265 in order to inlorrn the state ol tape.
`The signal output to DVCR 2651mm snart card 261
`lor the purpose ol a predetermined-number reproduc-
`tion or predetermined-time reproduction is an erase en-
`able signal. The signal lor allowing recorded and copied
`tape to be reproducible even though the EMM inlorrna-
`tion ol the smart card is changed is an to signal.
`The ID signal is mapped and stored with corre-
`sponding EMM in the lookup table ol sman card 261. ll
`necessary. the EMM corresponding to the ID signal is
`output.
`As shown in Fig. 24. the smart card comprises an
`ECM filter 301 tor filtering the ECM lrom the bit stream
`output lrorn the lFlD. a CPTC/tape state signal lilter 302
`lor littering the CPTC inlorrnation and the tape state sig-
`nal indicativeol the state ol tape lrom the bit stream out-
`put lrom the IRD. an EMM filter 303 lor littering the EMM
`lrorn the bit stream output lrorn the IRD. a lookup table
`304 lor. in case that the EMM is updated lor copyright
`protection by a broadcasting station. storing the previ-
`ous EMM containing inlorrnation required to decode the
`CPTC inlorrnation. and outputting CPTC inlorrnation
`corresponding in reproduction in order to continuously
`reproduce theprogramol cassette tape copied. an EMM
`processing portion 307 lor processing the EMM using
`the EMM output lrorn EMM filter 303 and lookup table
`304 and the tape state signal output lrorn CPTC/tape
`state signal filter 302. a CPTC processing ponion 306
`lor processing the CPTC inlorrnation using the signals
`output lrom CPTC/tape state signal filter 302 and EMM
`processing ponion 307. and a CA processing portion
`305 lor outputting control word CW using the signals
`output lrorn ECM litter 301 and EMM processing portion
`307.
`
`In case that the CPTC inlorrnation is contained in
`the EMM. as shown in Fig. 25. sman card 221 comprises
`an ECM litter 311 lor littering the ECM from the bit
`stream output lrorn the lFtD. an EMM litter 312 lor filter-
`ing the EMM containing the EMM lrom the bit stream
`output lrom the IRD. a tape state signal litter 313 tor lil-
`tering the tape stale signaloutput lrom the lFlD. a lookup
`table 314 lor. in case that the EMM is updated lor cop-
`yright protection by a broadcasting station. storing the
`previous EMM containing inlorrnation required to de-
`code the CPTC inlormation. and outputting CPTC inlor-
`mation corresponding in reproduction in order to contin-
`uously reproduce the program ol cassette tape copied.
`an EMM processing ponion 31 7 lor processing the EMM
`using the EMM output lrom EMM litter 312 and Iookup
`table 314 and the tape state signal output lrom tape
`state signal lilter 313. a CPTC processing portion 316
`tor processing the CPTC inlormation using the signals
`
`10
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`15
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`25
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`45
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`13
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`Petitioner Apple Inc. - EX. 1025, p. 5005
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`Petitioner Apple Inc. - Ex. 1025, p. 5005
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`25
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`EP0763936A2
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`26
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`output trom EMM filter 312 and tape state signal filter
`313, to thereby output ECM. enable erase signal and ID
`signal. and a CA processing portion 315 for outputting
`control word CW using the signals output from ECM filter
`311 and EMM processing ponion 317.
`ECM filter 301 or 311, CPTC/tape state signal filter
`302, EMM filter 303 or 312, and tape state signal filter
`313 extract ECM. CPTC, tape state signal and EMM.
`respectively. CA processing portion 305 or 315 gener-
`ates a control word and pertorms CA. EMM processing
`portion 307 or 317 outputs the EMM information to CA
`processing portion 305 or 315 and CPTC processing
`portion 305 or 316, and additionally stores the received
`EMM to the lookup table.
`lncase that the scrambled digital data and encoded
`CPTC information are recorded on tape and that the
`EMM information required to decode the CPTC informa-
`tion is changed. the reproduction of tape is made impos-
`sible. According to this fact. the previous EMM is stored
`in a memory such as the EEPFIOM of the smart card as
`shown in Figs. 13 and 14, which is the same as de-
`scribed before.
`
`Specifically, the lockup table is divided into two
`fields and stores ID information and EMM information,
`as shown in Fig, 13. In recording and copying, the ID
`information is recorded on tape, as shown in Fig. 14 in
`order to select corresponding EMM from the ID informa-
`tion recorded in the reproduction of tape.
`In other words. referringto Fig. 14, EMM processing
`portion 307 receives a recording/playback signal indi-
`cating that the current DVCR mode is recording or play-
`back, ID, and tape state signal having information of re-
`production number of tape. selects a proper EMM from
`the lockup table, outputs it to CPTC processing portion
`306 or 316 and CA processing portion 305 or 315. and
`transmits the ID information for the purpose of recording
`and copying to record it on tape.
`Referring to Fig. 11. CPTC processing portion 306
`or 316 pertorms copyright protection tor recording or
`copying. The CPTC information or ECM containing the
`CPTC information is input to output the output disable
`signal. enable erase signal. and the CPTC or ECM con~
`taining the CPTC.
`In order to control generation copy. CPTC process-
`ing portion 306 or 316. in case that the permissible gen-
`eration of the permissible generational field is greater
`than the present generation recorded on tape.
`the
`present generational field is increased by 1 and encrypt-
`ed again. " not. the output disable signal is generate