Source: http://www.google.com/patents/US6111917?dq=U.S.+Patent+No.+4,528,643
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Patent US6111917 - Image communication system and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA video transmission system and method is provided, by which if the arrival of a signal sent from the video receiving side to the sending side is delayed, or if an error is generated in a signal for communicating a receiving error, it is possible to prevent a situation such that no effective reference...http://www.google.com/patents/US6111917?utm_source=gb-gplus-sharePatent US6111917 - Image communication system and methodAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6111917 APublication typeGrantApplication numberUS 09/029,215PCT numberPCT/JP1997/002320Publication dateAug 29, 2000Filing dateJul 4, 1997Priority dateJul 5, 1996Fee statusPaidAlso published asCA2230379A1, CA2230379C, CN1126374C, CN1199531A, DE69734812D1, DE69734812T2, EP0849952A1, EP0849952A4, EP0849952B1, WO1998002002A1Publication number029215, 09029215, PCT/1997/2320, PCT/JP/1997/002320, PCT/JP/1997/02320, PCT/JP/97/002320, PCT/JP/97/02320, PCT/JP1997/002320, PCT/JP1997/02320, PCT/JP1997002320, PCT/JP199702320, PCT/JP97/002320, PCT/JP97/02320, PCT/JP97002320, PCT/JP9702320, US 6111917 A, US 6111917A, US-A-6111917, US6111917 A, US6111917AInventorsYasuhiro Tomita, Tsukasa Kimura, Hideaki Kimata, Ryota Suzuki, Takaaki Akimoto, Tadashi IchikawaOriginal AssigneeNippon Telegraph And Telephone CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (13), Non-Patent Citations (30), Referenced by (21), Classifications (57), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetImage communication system and method
US 6111917 AAbstract
A video transmission system and method is provided, by which if the arrival of a signal sent from the video receiving side to the sending side is delayed, or if an error is generated in a signal for communicating a receiving error, it is possible to prevent a situation such that no effective reference picture exists in a (picture) memory. In the present method, storing of encoded data into a memory section is controlled based on information indicated by a signal received from the video receiving side, and the control includes determination whether new data are stored, determination of an area for storing data in the memory section, and deletion of data stored in the memory section. In order to reduce the memory size, it is desirable to delete (i) reference pictures older than a reference picture used for the newest encoded video data which was correctly received, or (ii) a reference picture used for the encoded video data about which a receiving error is communicated from the video receiving side, among reference pictures stored in the memory section.
1. A video transmission system comprising:in the video sending side:an encoding section for encoding an input picture by an inter-picture coding method of compressing data using inter-picture differences, and outputting encoded video data; a signal receiving section for receiving a signal from the video receiving side, the signal indicating presence or absence of an error relating to the encoded video data received at the video receiving side and a picture number of the encoded video data; a memory section having buffers for maintaining the encoded video data output from the encoding section as reference pictures used for the encoding based on the inter-picture coding method; a reference picture determining section for selecting a reference picture used in the encoding section among pictures stored in the memory section if at least one picture is stored in the memory section, based on information indicated by the signal received by the signal receiving section; a reference picture communicating section for communicating a picture number of the reference picture used in the encoding section to the video receiving side; and a picture number communicating section for communicating a picture number of the encoded video data output from the encoding section; and in the video receiving side:an encoded data receiving section for receiving the encoded video data output from the encoding section of the video sending side, and detecting and outputting presence or absence of an error relating to the video data; a picture number receiving section for receiving the picture number of the encoded video data communicated from the picture number communicating section of the video sending side; a signal sending section for sending the video sending side a signal which indicates the picture number of the encoded video data received by the picture number receiving section and the presence or absence of an error with respect to the relevant video data which was detected by the encoded data receiving section; a decoding section for decoding the encoded video data received by the encoded data receiving section and outputting decoded video data; a memory section having buffers for maintaining the decoded video data output from the decoding section as reference pictures used for the decoding; a reference picture number receiving section for receiving the picture number of the reference picture used at the time of encoding, communicated from the reference picture communicating section of the video sending side; and a reference picture determining section for selecting a reference picture used in the decoding section among pictures stored in the memory section if at least one picture is stored in the memory section, according to the picture number of the reference picture received by the reference picture number receiving section; the system further comprising:memory changing means for performing control of data storage of the encoded video data output from the encoding section into the memory section based on information indicated by the signal received by the signal receiving section of the video sending side, the control including determination whether new data are stored, determination of an area for storing data in the memory section, and deletion of data stored in the memory section. 2. A video transmission system as claimed in claim 1, wherein the control of data storage performed by the memory changing section includes deletion of reference pictures older than a reference picture used for the newest encoded video data which was correctly received, among reference pictures stored in the memory section.
The present invention relates to a video transmission system and method for transmitting video data via a transmission path such as a wireless transmission path or a LAN, in which considerable numbers of transmission errors may occur.
In common video-coding methods such as MPEG or the like, differences between two successive pictures are generally determined in order to compress the amount of video data information. In such an inter-picture prediction method (called the "inter-picture coding method" hereinbelow), a present picture is predicted according to a previous picture, and a predicted difference is transmitted.
In consideration of the above problems, the present invention has as an object to solve the problem of the second conventional example, that is, to provide a video transmission system and method for realizing a desirable situation such that if an error is generated in a signal for communicating a receiving error, sent from the video receiving side to the video sending side, or if the arrival of a signal sent from the video receiving side to the video sending side is delayed, it is possible to prevent a situation such that no picture used for the switching of the reference picture exists in PM(s), by which (i) degradation of video quality due to the switching of the coding method to the intra-picture coding, and (ii) data increase, also due to the switching of the coding method to the intra-picture coding, leading to re-generating an error and repeating the intra-picture coding, can be prevented.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5719646 *Nov 17, 1995Feb 17, 1998Hitachi. Ltd.Method of and apparatus for decoding coded moving picture and outputting same with suppressed errorUS6040879 *Apr 21, 1997Mar 21, 2000Samsung Electronics Co., Ltd.Method for decoding video data corrupted by channel noiseUS6049570 *Dec 9, 1997Apr 11, 2000Oki Electric Industry Co., Ltd.Picture coderJPH0630396A * Title not availableJPH03259688A * Title not availableJPH04101590A * Title not availableJPH04297194A * Title not availableJPH07274176A * Title not availableJPH07303046A * Title not availableJPH08149474A * Title not availableJPS5763978A * Title not availableJPS62137983A * Title not availableJPS62200994A * Title not available* Cited by examinerNon-Patent CitationsReference1Fukunaga et al., "Error Resilient Video Coding by Dynamic Replacing of Reference Pictures," IEEE Globecom, vol. 3, Nov. 18, 1996, pp. 1503-1508.2 *Fukunaga et al., Error Resilient Video Coding by Dynamic Replacing of Reference Pictures, IEEE Globecom, vol. 3, Nov. 18, 1996, pp. 1503 1508.3 *ITU Telecommunication Standardization Sector, Draft text proposal of back channel operation in H.263 ,Expert s Group On Very Low Bitrate Video Telephony,pp. 1 5,LBC 96 314,Nov., 1996.4 *ITU Telecommunication Standardization Sector, Overhead of backward messages for H.263/Annex N ,Expert s Group On Very Low Bitrate Video Telephony, pp. 1 8, LBC 97 023, Feb., 1997.5 *ITU Telecommunication Standardization Sector, Performance results of NEWPRED on H.263/Annex A ,Expert Group On Very Low Bitrate Video Telephony,pp. 1 4,LBC 96 315,Nov., 1996.6ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "An error resilient video coding system using backward channel signaling", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-6, LBC-96-206, Jul., 1996.7ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "Core experiments on back-channel operation for H.263+", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-16, LBC-96-308, Nov., 1996.8ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "Error resilient video coding by erroneous backward channel", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-6, LBC-96-087, Apr., 1996.9ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "Results of core experiment for error resilient by backward channel toward H.263+", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-4, LBC-96-211, Jul., 1996.10ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "Specification of core experiment for error resilient by backward channel toward H.263+", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-7, LBC-96-212, Jul., 1996.11ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, "Stimulation results on NEWPRED under limited amount of reference memories", Expert's Group On Very Low Bitrate Video Telephony,pp. 1-4, LBC-96-309, Nov., 1996.12 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, An error resilient video coding system using backward channel signaling , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 6, LBC 96 206, Jul., 1996.13 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, Core experiments on back channel operation for H.263 , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 16, LBC 96 308, Nov., 1996.14 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, Error resilient video coding by erroneous backward channel , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 6, LBC 96 087, Apr., 1996.15 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, Results of core experiment for error resilient by backward channel toward H.263 , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 4, LBC 96 211, Jul., 1996.16 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, Specification of core experiment for error resilient by backward channel toward H.263 , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 7, LBC 96 212, Jul., 1996.17 *ITU Telecommunication Standardization Sector, Study Group 15, Working Party 15/1, Stimulation results on NEWPRED under limited amount of reference memories , Expert s Group On Very Low Bitrate Video Telephony,pp. 1 4, LBC 96 309, Nov., 1996.18 *ITU Telecommunication Standardization Sector, System related issues for H.263/Annex N ,Expert s Group On Very Low Bitrate Video Telephony, pp. 1 4, LBC 97 022, Feb., 1997.19ITU Telecommunication Standardization Sector,"Draft text proposal of back-channel operation in H.263+",Expert's Group On Very Low Bitrate Video Telephony,pp. 1-5,LBC-96-314,Nov., 1996.20ITU Telecommunication Standardization Sector,"Overhead of backward messages for H.263/Annex N",Expert's Group On Very Low Bitrate Video Telephony, pp. 1-8, LBC-97-023, Feb., 1997.21ITU Telecommunication Standardization Sector,"Performance results of NEWPRED on H.263/Annex A",Expert'Group On Very Low Bitrate Video Telephony,pp. 1-4,LBC-96-315,Nov., 1996.22ITU Telecommunication Standardization Sector,"System related issues for H.263/Annex N",Expert's Group On Very Low Bitrate Video Telephony, pp. 1-4, LBC-97-022, Feb., 1997.23S. Fukunaga et al., "Error resilient video coding by dynamic replacing of reference pictures", Proceedings of GLOBECOM, IEEE, pp. 1503-1508, 1996.24 *S. Fukunaga et al., Error resilient video coding by dynamic replacing of reference pictures , Proceedings of GLOBECOM, IEEE, pp. 1503 1508, 1996.25T. Kimura et al., "A study on amount of frame memories for error resilient visual communication using back-channel signaling", Proceedings of the 1997 IEICE General Conference,B-8-3,p.389,1997.26 *T. Kimura et al., A study on amount of frame memories for error resilient visual communication using back channel signaling , Proceedings of the 1997 IEICE General Conference,B 8 3,p.389,1997.27Y. Tomita et al., "A study on error resilient visual communication using backward channel signaling", Proceedings of the 1996 IEICE Communication Society Conference, B-867, p.352, 1996.28Y. Tomita et al., "An error resilient visual communication method using backward channel signaling", Technical Report of IEICE, MVE 96-57, pp. 21-28, Dec. 1996.29 *Y. Tomita et al., A study on error resilient visual communication using backward channel signaling , Proceedings of the 1996 IEICE Communication Society Conference, B 867, p.352, 1996.30 *Y. Tomita et al., An error resilient visual communication method using backward channel signaling , Technical Report of IEICE, MVE 96 57, pp. 21 28, Dec. 1996.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6621868 *Mar 2, 1999Sep 16, 2003Nippon Telegraph And Telephone CorporationVideo communication system and video communication methodUS7643559Sep 12, 2002Jan 5, 2010Ntt Docomo, Inc.Coding method, decoding method, coding apparatus, decoding apparatus, image processing system, coding program, and decoding programUS8102878Sep 29, 2005Jan 24, 2012Qualcomm IncorporatedVideo packet shaping for video telephonyUS8406309May 31, 2006Mar 26, 2013Qualcomm IncorporatedVideo rate adaptation to reverse link conditionsUS8514711 *Jun 15, 2006Aug 20, 2013Qualcomm IncorporatedReverse link lower layer assisted video error controlUS8537197Jan 10, 2008Sep 17, 2013Qualcomm IncorporatedContent- and link-dependent coding adaptation for multimedia telephonyUS8548048Dec 20, 2005Oct 1, 2013Qualcomm IncorporatedVideo source rate control for video telephonyUS8797850Dec 9, 2008Aug 5, 2014Qualcomm IncorporatedSystem and method to adapt to network congestionUS8842555Dec 21, 2005Sep 23, 2014Qualcomm IncorporatedMethods and systems for adaptive encoding of real-time information in packet-switched wireless communication systemsUS20070071030 *Sep 29, 2005Mar 29, 2007Yen-Chi LeeVideo packet shaping for video telephonyUS20070091815 *Dec 21, 2005Apr 26, 2007Peerapol TinnakornsrisuphapMethods and systems for adaptive encoding of real-time information in packet-switched wireless communication systemsUS20070091816 *Jun 15, 2006Apr 26, 2007Yen-Chi LeeReverse link lower layer assisted video error controlUS20070097257 *Dec 20, 2005May 3, 2007El-Maleh Khaled HVideo source rate control for video telephonyUS20090021572 *Jan 10, 2008Jan 22, 2009Qualcomm IncorporatedContent- and link-dependent coding adaptation for multimedia telephonyUS20090034610 *May 31, 2006Feb 5, 2009Yen-Chi LeeVideo rate adaptation to reverse link conditionsUS20090180379 *Dec 9, 2008Jul 16, 2009Qualcomm IncorporatedSystem and method to adapt to network congestionUS20130058409 *Feb 24, 2012Mar 7, 2013Shinya KadonoMoving picture coding apparatus and moving picture decoding apparatusUS20160119648 *Oct 22, 2015Apr 28, 2016Megachips CorporationImage processorEP2099228A2 *Sep 12, 2002Sep 9, 2009NTT DoCoMo, Inc.Coding method, decoding method, coding apparatus, decoding apparatus, image processing system, coding program, and decoding programEP2099228A3 *Sep 12, 2002Oct 21, 2009NTT DoCoMo, Inc.Coding method, decoding method, coding apparatus, decoding apparatus, image processing system, coding program, and decoding programEP2819411A1 *Sep 12, 2002Dec 31, 2014NTT DoCoMo, Inc.Coding method and decoding method* Cited by examinerClassifications U.S. Classification375/240.27, 375/E07.242, 375/E07.226, 375/E07.139, 375/E07.217, 375/E07.148, 375/E07.14, 375/E07.176, 375/E07.174, 375/E07.279, 375/E07.133, 375/E07.18, 375/E07.232, 375/E07.215, 375/E07.158, 375/E07.235, 375/E07.181, 375/E07.211, 375/E07.224, 375/E07.017International ClassificationH04N19/89, H04N7/24, H04N7/26, H04N7/30, H04N7/50Cooperative ClassificationH04N19/89, H04N21/643, H04N19/60, H04N19/174, H04N19/105, H04N19/15, H04N19/176, H04N19/124, H04N19/61, H04N19/107, H04N19/126, H04N19/172, H04N19/166European ClassificationH04N21/643, H04N7/26A4C2, H04N7/30S, H04N7/26A4Q2, H04N7/30, H04N7/64, H04N7/30E4, H04N7/50R, H04N7/26A4Q, H04N7/50E5F, H04N7/50, H04N7/50E5, H04N7/30E5F, H04N7/26A4B, H04N7/26A8L, H04N7/26A8B, H04N7/26A6E4G, H04N7/26A6W2, H04N7/26A8PLegal EventsDateCodeEventDescriptionFeb 25, 1998ASAssignmentOwner name: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TOMITA, YASUHIRO;KIMURA, TSUKASA;KIMATA, HIDEAKI;AND OTHERS;REEL/FRAME:009637/0424Effective date: 19980216Sep 26, 2003FPAYFee paymentYear of fee payment: 4Feb 1, 2008FPAYFee paymentYear of fee payment: 8Sep 22, 2011FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services