Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 1 of 30 PageID #: 7179
`Case 5:19-cv-00036—RWS Document 164-6 Filed 12/16/19 Page 1 of 30 PageID #: 7179
`
`EXHIBIT 20
`
`EXHIBIT 20
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 2 of 30 PageID #: 7180
`
`USOO9723268B2
`
`(12) United States Patent
`Iwabuchi et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 9,723.268 B2
`*Aug. 1, 2017
`
`(54) TELEVISION RECEIVER WITH A TV
`PHONE FUNCTION
`
`(71) Applicant: Hitachi Maxell, Ltd., Osaka (JP)
`(72) Inventors: Kazunori Iwabuchi, Yokohama (JP);
`Hiroki Mizosoe, Kawasaki (JP);
`Mutsumi Shimoda, Kawasaki (JP);
`Setiawan Bondan, Yamato (JP);
`Manabu Sasamoto, Yokohama (JP)
`(73) Assignee: Hitachi Maxell, Ltd., Osaka (JP)
`*) Notice:
`Subject to any disclaimer, the term of this
`y
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`This patent is Subject to a terminal dis
`claimer.
`
`(21) Appl. No.: 15/215,839
`(22) Filed:
`Jul. 21, 2016
`(65)
`Prior Publication Data
`US 2016/0330409 A1
`Nov. 10, 2016
`
`Related U.S. Application Data
`(63) Continuation of application No. 14/811,048, filed on
`Jul. 28, 2015, now Pat. No. 9,432,618, which is a
`(Continued)
`Foreign Application Priority Data
`
`(30)
`
`Sep. 25, 2008 (JP) ................................. 2008-246232
`
`(51) Int. Cl.
`H04N 7/4
`HO)4N 7/173
`
`(2006.01)
`(2011.01)
`(Continued)
`
`(52) U.S. Cl.
`CPC ..... H04N 7/17318 (2013.01); H04L 65/1063
`(2013.01); H04N 7/141 (2013.01);
`(Continued)
`
`(58) Field of Classification Search
`CPC ........... H04N 21/254; H04N 21/42203; H04N
`21/4223; H04N 21/431; H04N 21/4788:
`(Continued)
`References Cited
`
`(56)
`
`U.S. PATENT DOCUMENTS
`
`5,467,388 A * 11/1995 Redd, Jr. ............... HO4M 1,663
`379,196
`
`5,526,037 A
`
`6/1996 Cortjens et al.
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`JP
`JP
`
`3, 1993
`05-056190
`9, 1993
`05-236472
`(Continued)
`
`OTHER PUBLICATIONS
`
`Japanese Office Action received in corresponding Japanese Appli
`cation No. 2013-230194 dated Mar. 10, 2015.
`(Continued)
`Primary Examiner — Khai N Nguyen
`(74) Attorney, Agent, or Firm — Mattingly & Malur, PC
`
`ABSTRACT
`(57)
`A videophone system includes a processor which selectively
`sets a television (TV) broadcast program viewing function
`mode and videophone function mode in response to manual
`operation of a remote control, a decoder which performs, in
`the TV program view mode, a TV program-use decode
`function for decoding a broadcast program signal received
`from a TV tuner to thereby display it on a display screen
`while producing audio Sounds by loudspeakers and which
`performs, in the videophone function mode a videophone
`use decode function for decoding a videophone signal
`received from a distant party to thereby display on the screen
`an image of the distant party using the screen and speakers,
`and an encoder which performs a videophone-use encode
`function for encoding a video signal from a camera and a
`(Continued)
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 3 of 30 PageID #: 7181
`
`US 9,723.268 B2
`Page 2
`
`9/2011 Shyu
`8,013,938 B2
`12/2012 Fujisaki
`8,326,355 B1
`1/2013 Iwabuchi
`8,363,087 B2
`3/2014 Fujisaki
`8,676.273 B1
`9/2015 Iwabuchi
`9,124,758 B2
`9,432,618 B2 * 8/2016 Iwabuchi ............... HO4N 7/142
`2001/0041053 A1* 11/2001 Abecassis ............... A63F 13/10
`386,291
`2, 2002 Rakib
`2002fOO 19984 A1
`2/2003 Allen ....................... HO4N 5.76
`2003/0041333 A1
`2003/0206720 A1 11/2003 Abecassi
`T25, 106
`(CalSSS
`2004/O128700 A1* 7/2004 Pan .......................... HO4N 5.76
`T25,136
`2005, O250531 A1* 11/2005 Takebe.............. HO4W 52,0261
`455,550.1
`
`725/105
`
`2/2006 Istvan
`2006,004.1926 A1
`9/2006 Yamaguchi
`2006/0212920 A1
`3/2007 Shyu
`2007/0070188 A1 ck
`4/2007 Gazdzinski ........ HO4N 7.
`2007/0094691 A1
`6/2007 Marley
`2007/013.9514 A1
`9, 2007 Kondo et al.
`2007/0216760 A1
`2007/0233839 A1 10, 2007 Gaos
`2007/0261091 A1* 11/2007 Tachikawa ............. HO4N 7,163
`2008/0134278 A
`6/2008 Al-Kari
`2008/0172693 A1
`7/2008 Ludvig
`2008, 0212949 A1
`9/2008 Wachtfogel
`2008/0309759 A1* 12/2008 Wilson ............... GO8E3 13, 1968
`348/143
`2009, OO13373 A1
`1/2009 Iizuka
`2009, OO73253 A1
`3/2009 Lee
`2009, OO798.13 A1
`3, 2009 Hildreth
`2009, O174762 A1* 7, 2009 Takahashi ......... HO4M 1/72522
`348, 14.02
`2009,0251526 A1* 10, 2009 Book ..................... HO4N 7,147
`348, 14.01
`2010, OO73455 A1* 3, 2010 Iwabuchi ............... HO4N 7/142
`348, 14.04
`
`2/2013 Kwon et al.
`2013,0033561 A1
`2013/O127977 A1* 5, 2013 Iwabuchi ............... HO4N 7/142
`348, 14.01
`2015,0334352 A1* 11/2015 Iwabuchi ............... HO4N 7/142
`348, 14.04
`
`FOREIGN PATENT DOCUMENTS
`
`Voice signal from a microphone to generate a videophone
`signal, which is sent to the distant party via a network.
`
`4 Claims, 10 Drawing Sheets
`
`O
`O
`Related U.S. Application Data
`continuation of application No. 13/723,312, filed on
`Dec. 21, 2012, now Pat No. 9,124,758, which is a
`continuation of application No. 12/457.257, filed on
`Jun. 4, 2009, now Pat. No. 8,363,087.
`
`AV e. we
`
`(2011.01)
`(2011.01)
`(2011.01)
`(2011.01)
`(2011.01)
`(2006.01)
`
`(51) Int. Cl.
`H04N 2L/254
`H04N 2L/422
`H04N 2L/4223
`H04N 2L/43
`H04N 2L/4788
`H04L 29/06
`(52) U.S. Cl
`CPC ............. H04N 7/142 (2013.01), H04N 7/147
`(2013.01); H04N 7/148 (2013.01); H04N
`21/254 (2013.01); H04N 2 1/4223 (2013.01);
`H04N 2 1/42203 (2013.01); H04N 2 1/431
`(2013.01). H04N 21/4788 (2013.01)
`(58) Field of Classification Search
`CPC ........ H04N 7/141; H04N 7/142; H04N 7/147;
`H04N 7/148; H04N 7/17318; H04N
`2007/145, H04N 5/272; H04N 7/14:
`HO4N 7/144 HO4N 7/15: HO4N 7/152
`H04N 7/155; H04N 7/157; G01S 5/0072;
`H04M 1/72572; H04M 2201/40: H04M
`2250/52; H04M 3/4936; H04M 3/5191;
`H04W 4/18: H04W 4/185
`USPC ......... 348/14.01, 14.02, 14.03, 14.04, 14.05,
`348/1406 14.07 14.08 14.09 14.1
`348/14.11, 14.12, 14.13, 14.14, 15.15,
`348/14.16; 379/265.03; 455/414.1, 566;
`704/270
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`5,710,591 A *
`
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`JP
`
`05-236472 A
`O7-184174
`08-28928O
`09-083983
`2000184346 A
`2001086475 A
`2003-34.8510
`2006-20286
`2006-157610
`2007-300594. A
`2008-079.215
`
`9, 1993
`7, 1995
`11, 1996
`3, 1997
`6, 2000
`3, 2001
`12/2003
`6, 2004
`6, 2006
`11, 2007
`4/2008
`
`OTHER PUBLICATIONS
`
`6/1996 Morikawa
`5,528,285 A
`3/1997 Abecassis
`5,610,653 A
`5,684,918 A * 11/1997 Abecassis ............... A63F 13/10
`348/1401
`1/1998 Bruno ............... H04M 3/42221
`348, 14.06
`5,771,065 A * 6/1998 Hijikata ................. HO4N 7,147
`348, 14.01
`Japanese Office Action dated Aug. 5, 2014 in corresponding Japa
`5,778,053 A * 7/1998 Skarbo ................... HO4M 11F10
`6,339,842 B1
`1/2002 Fernandez et all
`''' nese Application No. 2013-2301.94.
`6.536742 B
`3/2003 Yang
`Domestic technical journal 2007-00349-006—Skype realizes handy
`6,859,526 B2 * 2/2005 Macklin .............. HO4M 1,6505
`video call.
`348, 14.06
`
`7.593,031 B2
`
`9, 2009 Root et al.
`
`* cited by examiner
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 4 of 30 PageID #: 7182
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 1 of 10
`
`US 9,723.268 B2
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 5 of 30 PageID #: 7183
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 2 of 10
`
`US 9,723,268 B2
`
`
`
`FIG.2
`
`DISPLAY SCREEN
`
`BROADCAST
`TUNER
`
`DECODER
`
`SPEAKER
`
`HTML
`BROWSER -
`
`PROCESSORE -
`
`RC SIGNAL
`RECEIVER
`
`HDD
`
`INBOUND
`CALL
`DETECTOR
`
`NETWORK
`/F
`
`CAMERA
`
`He
`
`MIC
`
`ENCODER
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 6 of 30 PageID #: 7184
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 3 of 10
`
`US 9,723,268 B2
`
`FIG.3
`
`TELEPHONE
`
`VOD
`
`VIDEOPHONE
`FUNCTION-ADDED
`TV RECEIVER
`
`VIDEOPHONE
`FUNCTION-ADDED
`TV RECEIVER
`
`1
`
`
`
`
`
`
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 7 of 30 PageID #: 7185
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 4 of 10
`
`US 9,723,268 B2
`
`FIG.5
`
`EMi
`
`VOD PROCESSING
`
`PHONE PROCESSING
`
`PWBUTTONDEPRESSED
`
`PWBUTTONDEPRESSED
`
`oVODBUTTONDEPRESSED
`oBROWSERSTART
`
`PHONEBUTTON PRESSED
`oBROWSER START
`
`SERVERSENDS
`OPERATIONSCREEN
`
`TTLESELECTED8DECIDED
`
`CALDESTINATION
`SELECTED8DECEDED
`
`CHECKCHARGE&
`PLAYBACKRIGHT
`
`(DISPLAYCALING MESSAGE
`e ACTIVATECAMERA, MIC&
`ENCODER
`
`OSWITCH DECODER INPUT
`OSWITCHDECODER INPUT
`a DECODER OPERATIONSTART a DECODER OPERATIONSTART
`PLAYBACK
`oTALKING BYPHONE
`oSTOPBUTTONDEPRESSED
`oSTOPBUTTON DEPRESSED oECODER STOP
`a DECODER STOP
`oBROWSERSTOP
`GBROWSERSTOP
`OCAMERA, MC &
`ENCODER DEACTIVATED
`
`7
`
`PAYBACKEND
`
`CALEND
`
`3.
`DECODER
`SDEACTMATED
`
`FIG.6
`
`
`
`woff
`
`DURINGVOD
`DURINGTVWATCHING | WR
`
`OTHERS
`
`oPRESENTSTATESAVE
`AUTO-VIDEORECSTARTAUTO-PAUSE . CAHANDING
`AUTO-PWON
`oCALLHANDLING. RECOVER TOSAVED
`OCALL HANDLING OCALHANDLENG
`eTVWATCHING OAUTO-PLAYSTART
`PAUSERESET
`STATE
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 8 of 30 PageID #: 7186
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 5 of 10
`
`US 9,723.268 B2
`
`FIG.7A
`SELF-SIDEVIDEOPHONE
`FUNCTION-ADDED TV RECEIVER 1
`DETECTDEPRESSION
`OF PHONEBUTTON7d
`
`GET BROWSER
`13 STARTED
`
`INSTRUCT TO
`ACTIVATE
`DECODER 11"
`
`OTHER-SIDEVIDEOPHONE
`FUNCTION ADDED TVRECEIVER 1"
`
`ENCODER 18
`GETSSTARTED
`
`DECODER 11
`GETS STARTED
`
`
`
`
`
`
`
`TAKING BYPHONE
`
`NSTRUCT TO
`Ellis
`
`
`
`NOTIFY
`ASEASNSF
`
`
`
`NOTIFY
`ACTIVATION OF
`ENCODER 18
`
`
`
`
`
`
`
`ACTIVATE
`DECODER 11"
`
`ACTIVATE
`ENCODER 18
`
`
`
`
`
`
`
`
`
`
`
`700
`
`701
`
`703
`
`
`
`704
`
`
`
`706
`
`FIG.7B
`
`SEF-SIDEVIDEOPHONE
`FUNCTION-ADDED TVRECEIVER1
`710 - 259RSSN
`OF STOPBUTTON7n
`
`714.
`
`
`
`711
`
`DEACTMATE
`DECODER 11
`
`
`
`
`
`
`
`INSTRUCT
`DEACTIVATION
`OFDECODER 11"
`
`712
`
`NOTIFYDEACTIVATION
`
`DEACTMATE
`ENCODER 18
`
`
`
`
`
`
`
`NSTRUCT
`DEACTIVATION
`OFENCODER 18
`
`713
`
`
`
`716
`
`OTHER-SIDEVIDEOPHONE
`FUNCTION ADDED TVRECEIVER1'
`
`DEACTMATE
`DECODER 11
`
`DEACTIVATE
`ENCODER 18
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 9 of 30 PageID #: 7187
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 6 of 10
`
`US 9,723,268 B2
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 10 of 30 PageID #: 7188
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 7 of 10
`
`US 9,723,268 B2
`
`
`
`FIG.9
`
`la
`
`DISPLAY SCREEN
`
`BROADCAST
`TUNER
`
`INBOUND
`CALL
`DETECTOR
`
`NETWORK
`?F
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 11 of 30 PageID #: 7189
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 8 of 10
`
`US 9,723,268 B2
`
`1 OOO
`
`POWER ON
`
`
`
`CHECK CONNECTION STATE
`OF VIDEO CAMERA 30
`
`FIG.10
`
`o NOT CONNECTED
`e CONNECTED->DISCONNECTED
`
`VIDEO CAMERA
`3O CONNECTED
`o CONNECTED
`o DISCONNECTED->CONNECTED
`
`DISABLE VIDEOPHONE
`FUNCTION MODE
`
`FIG 11
`
`SET ENCODER 34 OF
`VIDEO CAMERA30 IN
`LIVE OUTPUT MODE
`
`ENABLE VIDEOPHONE
`FUNCTION MODE
`
`POWER ON
`
`CHECK CAL STATE
`
`VIDEOPHONE
`REQUESTED
`
`SET ENCODER 34 OF
`VIDEO CAMERA 3ON
`LIVE OUTPUT MODE
`
`SET WIDEO CAMERA
`ENCODER IN CUMULATIVE
`VIDEO-REC MODE
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 12 of 30 PageID #: 7190
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 9 of 10
`
`US 9,723,268 B2
`
`
`
`FIG. 12
`
`DISPLAY SCREEN
`
`NBOUND
`CALL
`DETECTOR
`
`NETWORK
`I/F
`
`HTML
`BROWSER -
`
`ENCODER
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 13 of 30 PageID #: 7191
`
`U.S. Patent
`
`Aug. 1, 2017
`
`Sheet 10 of 10
`
`US 9,723,268 B2
`
`
`
`writer"
`(b) 9UTTTS LEFT
`
`SPEAKER 3R
`
`SPEAKER 3L
`
`FIG.14
`
`A
`
`A 4s
`- /
`B
`1.
`- / A4s.
`A
`
`(C) INPUT OF MIC 5
`
`(d) INPUT OF ENCODER 18
`
`-42 = 2 --
`
`

`

`Case 5:19-cv-00036-RWS Document 164-6 Filed 12/16/19 Page 14 of 30 PageID #: 7192
`
`US 9,723,268 B2
`
`1.
`TELEVISION RECEIVER WITH A TV
`PHONE FUNCTION
`
`INCORPORATION BY REFERENCE
`
`This application is a Continuation of U.S. application Ser.
`No. 147811,048, filed Jul. 28, 2015, now U.S. Pat. No.
`9,432,618, which is a Continuation of U.S. application Ser.
`No. 13/723,312, filed Dec. 21, 2012, now U.S. Pat. No.
`9,124,758, which is a Continuation of U.S. application Ser.
`No. 12/457,257, filed Jun. 4, 2009, now U.S. Pat. No.
`8.363,087. The present application claims priority from U.S.
`application Ser. No. 12/457.257 filed Jun. 4, 2009, now U.S.
`Pat. No. 8.363,087, which claims priority from Japanese
`application JP2008-246232 filed on Sep. 25, 2008, the
`content of which is hereby incorporated by reference into
`this application.
`
`10
`
`15
`
`BACKGROUND OF THE INVENTION
`
`2
`of each other. Upon receipt of an incoming telephone call at
`the videophone during watching a TV broadcast program by
`the TV receiver, a message which notifies arrival of such
`phone call is displayed on the TV receiver's display screen
`so that a user easily knows that there is an incoming phone
`call. In this event, the user must walk to a place at which this
`Videophone is put and perform manual operations for startup
`of talking with a caller on the videophone. This is a
`time-consuming and troublesome work for the user who is
`watching his or her preferred TV broadcast program.
`In the case of not only starting a telephone call but also
`ending the phone call, the user is required to perform a
`manual operation for the phone call completion (e.g., putting
`a transceiver handset on a base unit or “cradle'). This
`operation also is performed at the location in which the
`Videophone is placed.
`In this way, traditionally, when there is an incoming phone
`call during watching a TV broadcast program by TV
`receiver, the user must move from a place at which he or she
`was there until then and perform manual operations for
`startup and completion of the phone call. These operations
`are time-consuming and troublesome works to the user.
`To provide a solution to the above-stated problem, this
`technology provides a new and improved TV receiver with
`TV function (referred to as videophone function-added TV
`receiver hereafter) set having videophone call handling
`functionality, which performs both the reception of a digital
`broadcast program signal and the transmission and reception
`of a videophone signal between itself and another video
`phone function-added TV receiver at the other end of a
`communication line, wherein the videophone function
`added TV receiver is characterized by having a decoder
`which decodes a received digital broadcast program signal
`and videophone signal, a display panel to which is Supplied
`a video signal that is decoded by the decoder and which
`visually displays it on a screen, a loudspeaker module to
`which is Supplied an audio/voice signal which is decoded by
`the decoder, a camera, a microphone, and an encoder which
`encodes output signals of the camera and microphone.
`Another feature of the videophone function-added TV
`receiver lies in that it further includes an encoder which
`generates a videophone signal to be transmitted for video
`phone communications and a means for detecting comple
`tion of a videophone signal decoding operation of the
`decoder and for stopping an encoding operation of the
`encoder for generation of the videophone signal.
`This technology also provides a video telephone system
`using a plurality of videophone function-added TV receiver
`sets which are linked together via a network for enabling
`users to make videophone calls between these videophone
`function-added TV receivers, wherein each videophone
`function-added TV receiver includes a decoder which has a
`Videophone-use decode function for decoding a videophone
`signal from another videophone function-added TV receiver
`at the other end of a line and a TV program-use decode
`function for decoding a digital broadcast program received,
`a display panel which displays a video signal that is decoded
`by the decoder, a loudspeaker to which is Supplied an audio
`signal that is decoded by the decoder, a camera, a micro
`phone, an encoder which has a videophone-use encode
`function for encoding a video signal from the camera and an
`audio signal from the microphone to thereby generate a
`videophone signal to be sent forth toward a videophone
`function-added TV receiver of a distant party at the other
`end of a line in a videophone call session, a means for
`stopping a decoding operation of the decoder by means of
`the videophone-use decode function in responding to either
`
`25
`
`30
`
`35
`
`Field of the Invention
`The present technology relates to a television (TV)
`receiver set with TV phone functionality added thereto,
`which is arranged to have a video telephone call enabling
`means to thereby make it possible to perform video/voice
`based telecommunication with another machine. This tech
`nology also relates to a TV phone system using videophone
`function-added TV receivers of this type.
`Description of the Related Art
`A telephone communication system and TV broadcast
`system are independently established systems. Traditionally,
`a telephone equipment and TV receiver set are quite differ
`ent apparatuses. In cases where a telephone receives an
`incoming call and generates a ring Sound or melody (calling
`Sound) signaling the incoming call, a called party fails to
`hear this sound from time to time. A technique for avoiding
`this risk is disclosed, for example, in JP-A-5-56.190. With
`this technique, a telephone is communicatively connected by
`a signal transmission line to a TV receiver, wherein the TV
`receiver is arranged so that upon receipt of an incoming call
`40
`at the telephone, the TV receiver displays a phone call
`arrival message on its display Screen.
`Alternatively, a video telephone apparatus is also known,
`which is arranged to enable a user to make a phone call with
`a distant party at the other end of a line by transmission and
`reception of video images and Voices. This type of video
`phone typically has a camera, microphone, loudspeaker and
`image display device and is designed to transmit toward the
`distant party's videophone video and Voice signals that are
`obtained by the camera and microphone of the videophone
`on the self side, receive video and voice signals from the
`distant party's videophone, and display this video by the
`image display device while reproducing the Voice by the
`speaker. In a case where transmission is done to the distant
`party's videophone, a video image and Voice are subjected
`to compression processing (encoding) for transmission
`while simultaneously performing expansion processing (de
`coding) of a video and voice that are received from the
`distant party's videophone, and reproducing them at the
`image display device and speaker (for detail, see JP-A-9-
`83983).
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`SUMMARY OF THE INVENTION
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`In the prior known technique as disclosed in JP-A-5-
`56.190, the TV receiver and the videophone are arranged so
`that these are discrete devices which operate independently
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`a stop operation or the end of a videophone signal from the
`videophone function-added TV receiver of the distant party
`in the videophone call session, and a means for detecting
`completion of the videophone signal decoding operation
`performed by the decoder and for stopping the encoding
`operation of the encoder, wherein in case one of the video
`phone function-added TV receivers which are presently
`involved in a videophone communication session experi
`ences termination of the decode operation of the decoder by
`means of the videophone-use decode function thereof in
`response to execution of the stop operation, when the
`encoding operation of the encoder is stopped in responding
`thereto, the videophone function-added TV receiver of the
`distant party, e.g., a calling party or a called party at the other
`end of the line, is such that the decoder stops its decoding
`operation by means of the videophone-use decode function
`thereof to thereby force the encoder to stop its encoding
`operation by means of the videophone-use encode function
`in response to the stop of the decoding operation.
`This technology also provides a video telephone system
`using a plurality of videophone function-added TV receiver
`sets which are linked together via a network for enabling
`users to make videophone calls between these videophone
`function-added TV receivers, wherein each videophone
`function-added TV receiver includes a decoder which has a
`Videophone-use decode function for decoding a videophone
`signal from another videophone function-added TV receiver
`at the other end of a line and a TV program-use decode
`function for decoding a digital broadcast program received,
`a display panel which displays a video signal that is decoded
`by the decoder, a loudspeaker to which is Supplied an audio
`signal that is decoded by the decoder, a camera, a micro
`phone, an encoder which has a videophone-use encode
`function for encoding a video signal from the camera and an
`audio signal from the microphone to thereby generate a
`videophone signal to be sent forth toward a videophone
`function-added TV receiver of a distant party at the other
`end of a line in a videophone call session, a means for
`stopping a decoding operation of the decoder by means of
`the videophone-use decode function in responding to either
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`a stop operation or the end of a videophone signal from the
`videophone function-added TV receiver of the distant party
`in the videophone call session, a means for detecting
`completion of the videophone signal decoding operation
`performed by the decoder and for stopping the encoding
`operation of the encoder, and a means for detecting comple
`tion of the videophone signal decoding operation of the
`decoder and for sending a stop command signal to the
`videophone function-added TV receiver of the distant party
`at the other end of the line, wherein in case one of the
`videophone function-added TV receivers which are pres
`ently involved in a videophone communication session
`experiences termination of the decode operation of the
`decoder by means of the videophone-use decode function
`thereof in response to execution of the stop operation, when
`the encoding operation of the encoder is stopped in respond
`ing thereto, and also when the stop command signal is sent
`to the videophone function-added TV receiver of the distant
`party, this distant party's videophone function-added TV
`receiver operates so that the decoder stops its decoding
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`operation by means of the videophone-use decode function
`thereof in response to receipt of the stop command signal
`and, in response to this decode operation stop, the decoder
`stops the decoding operation by means of the videophone
`use decode function thereof.
`This technology also provides a video telephone system
`using a plurality of videophone function-added TV receiver
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`sets which are linked together via a network for enabling
`users to make videophone calls between these videophone
`function-added TV receivers, wherein each videophone
`function-added TV receiver includes a decoder which has a
`Videophone-use decode function for decoding a videophone
`signal from another videophone function-added TV receiver
`at the other end of a line and a TV program-use decode
`function for decoding a digital broadcast program received,
`a display panel which displays a video signal that is decoded
`by the decoder, a loudspeaker to which is Supplied an audio
`signal that is decoded by the decoder, a camera, a micro
`phone, an encoder which has a videophone-use encode
`function for encoding a video signal from the camera and an
`audio signal from the microphone to thereby generate a
`videophone signal to be sent forth toward a videophone
`function-added TV receiver of a distant party at the other
`end of a line in a videophone call session, a means for
`stopping an encoding operation by means of the video
`phone-use encode function of the encoder in response to a
`stop operation of a videophone call, a means for detecting
`completion of an encoding operation of a video signal from
`the camera and an audio signal from the microphone to be
`performed by the encoder and for stopping the decoding
`operation by means of the videophone-use decode function
`of the decoder, and a means for detecting completion of the
`encoding operation of the encoder and for sending a stop
`command signal to a videophone function-added TV
`receiver of a distant party at the other end of a line, wherein
`in case one of the videophone function-added TV receivers
`which are presently involved in a videophone communica
`tion session experiences termination of the encode operation
`of the encoder by means of the videophone-use encode
`function thereof in response to execution of a stop operation,
`when the decoding operation of the decoder is stopped in
`responding thereto, and also when the stop command signal
`is sent to the videophone function-added TV receiver of the
`distant party, this distant party's videophone function-added
`TV receiver is such that the encoder stops its encoding
`operation by means of the videophone-use encode function
`thereof in response to receipt of the stop command signal
`and, in response to the stop of this encode operation, the
`decoder stops the decoding operation by means of the
`videophone-use decode function thereof.
`This technology also provides a videophone function
`added television receiver having a video camera detachably
`connected to an apparatus main body, wherein the TV
`receiver includes in the apparatus main body a decoder
`which has a television program-use decode function for
`decoding a digital broadcast program signal received and a
`Videophone-use decode function for decoding a video tele
`phone signal as received in a videophone call session, and a
`processor for control of each component, wherein
`the video camera has a camera, a microphone, a storage
`device which stores therein a video signal from the camera
`and an audio signal from the microphone, and an encoder to
`which are Supplied a video signal as output from the camera
`and an audio signal as output from the microphone and
`which encoder has a videophone-use encode function of
`encoding the video signal and the audio signal into a video
`telephone signal to be transmitted to a videophone function
`added television receiver of a distant party in a videophone
`call session and a video recording-use encode function for
`encoding the video signal and the audio signal into a video
`signal to be recorded in the storage device, and wherein in
`a state that the video camera is connected to the apparatus
`main body, when the decoder is in a state that it operates to
`perform the videophone-use decode function, the processor
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`sets the encoder in a state that it operates to perform the
`Videophone-use encode function thereof, resulting in the
`decoder being switched from the operation state of the
`Videophone-use decode function to an operation state of the
`television program-use decode function and, alternatively,
`when the video camera is in a state that it is disconnected
`from the apparatus main body, the processor sets the encoder
`in a state that it operates to perform the video recording-use
`encode function.
`In the videophone function-added television receiver, the
`Video camera is a separate equipment independent of the
`apparatus main body and is detachably coupled to the
`apparatus main body.
`Alternatively, in the videophone function-added televi
`sion receiver, the video camera is internally mounted in the
`apparatus main body.
`This technology also provides a videophone system using
`a plurality of videophone function-added TV receivers of the
`type stated above, which are linked together via a network
`for enabling users to make a videophone call between any
`two of the videophone function-added TV receivers,
`wherein the system includes a means for stopping an encod
`ing operation by means of a videophone-use encode function
`of an encoder in response to a stop operation of a video
`phone call, a means for detecting completion of an encoding
`operation of a video signal from a camera and an audio
`signal from a microphone to be performed by the encoder
`and for stopping a decoding operation by means of a
`Videophone-use decode function of a decoder, and a means
`for detecting completion of the encoding operation of the
`encoder and for sending a stop command signal to a video
`phone function-added TV receiver of a distant party at the
`other end of a line, wherein in case one of the videophone
`function-added TV receivers which are presently involved in
`a videophone communication session experiences termina
`tion of the encode operation of the encoder by means of the
`Videophone-use encode function thereof in response to
`execution of a stop operation, when the decoding operation
`of the decoder is stopped in responding thereto, and also
`when the stop command signal is sent to the videophone
`function-added TV receiver of the distant party, this distant
`party's videophone function-added TV receiver is such that
`the encoder stops its encoding operation by means of the
`Videophone-use encode function thereof in response to
`receipt of the stop command signal and, in response to this
`encode operation stop, the decoder stops the decoding
`operation by means of the videophone-use decode function
`thereof.
`This technology also provides a videophone function
`added TV receiver, wherein a decoder includes a first
`decoder operative to decode the received digital broadcast
`program signal and a second decoder for decoding the video
`telephone signal, wherein a display panel performs two
`window display for simultaneously displaying on one screen
`a video image based on the digital broadcast program signal
`decoded by the first decoder and a video image based on the
`Video telephone signal decoded by the second decoder,
`wherein an echo canceller is provided to receive an audio
`signal as output from the microphone and an input audio
`signal of the speaker, and wherein an echo signal due to
`unwanted mixture of audio Sounds from the speaker into the
`audio signal as output from the microphone is canceled by
`the echo canceller using the input audio signal of the speaker
`and is then Supplied to an encoder.
`The technology further provides a videophone system
`using videophone function-added TV receivers of the type
`stated Supra, wherein a decoder includes a first decoder
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`operative to decode the received digital broadcast program
`signal and a second decoder for decoding the video tele
`phone signal, wherein a display panel performs two-window
`display for simultaneously displaying on one screen a video
`image based on the digital broadcast program signal
`decoded by the first decoder and a video image based on the
`Video telephone signal decoded by the second decoder,
`wherein an echo canceller is provided to receive an audio
`signal as output from the microphone and an input audio
`signal of the speaker, and wherein an echo signal due to
`mixture of audio Sounds from the speaker into the audio
`signal as output from the microphone is canceled by the echo
`canceller using the input audio signal of the speaker and is
`then Supplied to an encoder.
`With the above-stated arrangement, it is possible to pro
`vide a TV receiver with increased usability for users. For
`example, video image displaying for a videophone call is
`performed using the display Screen and loudspeaker module
`which are inherently used for digital TV broadcast pro
`grams; so, it is possible for a user to start a phone call and
`finish the call without having to move from a place at which
`S/he is enjoying a digital TV broadcast program. This saves
`the user's labor for Such moving action. Additionally, upon
`completion of the phone call, the decoder and encoder are
`automatically rendered inoperative without requiring the
`user to perform manual operations. This results in a decrease
`in labor for Such operations. It is also possible to prevent a
`calling party from becoming aware of the digital TV broad
`cast program which is watched by the user.
`Other objects, features and advantages of the invention
`will become apparent from the following description of the
`embodiments of the invention taken in conjunction with the
`accompanying drawings.
`
`BRIEF DESCRIPTI