GB2331886A - Representation of type of coded information in coded video data - Google Patents

Representation of type of coded information in coded video data Download PDF

Info

Publication number
GB2331886A
GB2331886A GB9826210A GB9826210A GB2331886A GB 2331886 A GB2331886 A GB 2331886A GB 9826210 A GB9826210 A GB 9826210A GB 9826210 A GB9826210 A GB 9826210A GB 2331886 A GB2331886 A GB 2331886A
Authority
GB
United Kingdom
Prior art keywords
encoded
cod
field
encoding
dct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9826210A
Other versions
GB2331886B (en
GB2331886A8 (en
GB9826210D0 (en
Inventor
Jiangtao Wen
John Villasenor
Jeong-Hoon Park
Dong-Seek Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
University of California
Original Assignee
Samsung Electronics Co Ltd
University of California
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22073174&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2331886(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Samsung Electronics Co Ltd, University of California filed Critical Samsung Electronics Co Ltd
Publication of GB9826210D0 publication Critical patent/GB9826210D0/en
Publication of GB2331886A publication Critical patent/GB2331886A/en
Publication of GB2331886A8 publication Critical patent/GB2331886A8/en
Application granted granted Critical
Publication of GB2331886B publication Critical patent/GB2331886B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/007—Transform coding, e.g. discrete cosine transform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

A method for representing encoding or non-encoding of video information. In this method, an image is encoded by extending a code (COD) field which is used in H.263 and MPEG-4 to comprise at least two bits. Conveniently the two bit format indicates the cases where neither a motion vector (MV) nor a discrete cosine transform (DCT) value are encoded, where both the MV and the DCT value are encoded, and where only the MV is encoded. Therefore, in a channel with errors, the extended OCD field can be used in the error allowable mode. Also, video information can be encoded using fewer bits than in the prior art where the motion of an image is constant.

Description

2331886 METHOD FOR REPRESENTING ENCODING UPON CODING VIDEO INFORMATION The
present invention relates to a method for coding video information, and more particularly, to a method of representing encoding or nonencoding by extension of a video information field. Furthermore, the present invention relates to a method of reducing the amount of video bits, by which a method of representing encoding or non-encoding by the extension of an information field for representing encoding or non-encoding can be applied to an error allowable mode, and by which the amount of bits depending on the characteristics of video information to be coded can be reduced.
is In case of a block-based codec, an object-based codec, or a shape-based codec, a general technique for encoding a moving picture is as follows. A motion vector being the most similar to a current block in a previous frame, and a real value or a modified value (e.g., DCT) with respect to the difference between real data are encoded to produce data, so that a block is encoded.
In H.263 and MPEG-4, a "COD (code)" field is used to see whether these two characteristic values are encoded in bit stream.
Figure 1 is a concept view showing a method of representing encoding and non-encoding in a general bit stream.
As shown in Figure 1, whether a motion vector MV and a DCT coefficient are encoded or not is represented by a one-bit value of a COD field. That is, if the bit of the COD field is 11011, it indicates that the MV and the DCT are
2 encoded, but if the bit thereof is 1,111, it indicates that they are not encoded.
However, when encoding or non-encoding of a block is reported by using the COD field, this information is represented by only one bit. Thus, in some cases when this one bit is used in a channel having an error, the entire information is easily misinterpreted by only the error of one bit.
Also, in the case of an image motion on a predetermined background, only motion vector (MV) is required during actual encoding and the difference value (DCT) is not needed. In the conventional technique, the is difference value (DCT) is also encoded to thereby cause the amount of bits to increase.
An aim of the present invention is to provide a method of representing encoding upon encoding video information, by which misinterpretation can be reduced when video information is transmitted in a channel with an error.
Another aim of the present invention is to provide a method of representing encoding upon encoding video information, by which data, obtained by encoding the motion of an image is smaller than in the conventional art with respect to constant video motion information.
According to the present invention there is provided a method for representing encoding when video information is coded, characterized in that an image is encoded by extending a code (COD) field which is used in a bit stream to indicate the cases where neither a motion vector (MV) 35 nor a discrete cosine transform (DCT) value are encoded,
3 where both the MV and the DCT value are encoded, and where only the MV is encoded.
Preferably, said extended code field comprises at least two bits.
Preferably, said extended code field is used in H.263 or MPEG-4 encoding standards.
Preferably, when the COD field has a bit value of 111 111, it indicates that neither the MV nor the DCT value are encoded, when the COD field has a bit value of 110 011, it indicates that both the MV and the DCT are encoded, and when the COD field has a bit value of 110 111, it indicates is that only the MV is encoded.
Preferably, when an error exists in a channel, only the two values of 110011 and 111111 are used in an error allowable mode.
Preferably, when packetized data is divided and transmitted in the error allowable mode, the number of 1,111 of the COD f ield in a packet is encoded using variable length coding (VLC) and transmitted before the COD field without transmitting the original COD, and when the combined code has a bit value of 110 011, 11011 is transmitted, and when the combined code has a bit value of 111 ill, 1,111 is transmitted, and in the cases of the other combinations, the original codes of VLC and COD are 30 transmitted without change.
Preferably, information is encoded by using only MV, under the background in which the motion of an image is regular.
- 4 For a better understanding of the invention, and to show how embodiments of the same may be carried into effect, reference will now be made, by way of example, to the accompanying diagrammatic drawings, in which:
Figure 1 is a schematic view showing a method for representing encoding and non-encoding in a general bit stream; and Figure 2 is a schematic view showing a method for representing encoding and non-encoding in a bit stream according to a preferred embodiment of the present invention.
As shown in Figure 2, extension of one bit in a COD field results in a reduction in the possibility of decoding erroneous COD information, and generation of data encoded in a smaller amount than the conventional art with respect to an image which can sufficiently represent information by using only a motion vector. That is, the COD field represents not only the encoding or non-encoding of two representative values but also a case when only a motion vector, among the two representative values, is required. For this, the COD field is 2 bit- tabled. That is, for example a value 111 111 indicates that neither MV nor DCT is encoded, 110 011 indicates that both the MV and DCT are encoded, and 110 1" indicates that only the MV is encoded. Here, we can recognize that 111 011 may indicate that only the DCT is encoded, but this option is not used in this embodiment.
When a video codec performs encoding in an error allowable mode via this expression of the COD, only two values of 110 011 and 111 111 are used to prevent defective transmission of 110 ill. In this way, misinterpretation is less likely to occur in the channel with errors than the case of representing the COD in one bit.
Also, when a piece of packetized data is divided and transmitted in the error allowable mode, the following method can be used. That is, the number of 11111 of COD in a packet is encoded using variable length coding (VLC) and transmitted before COD. Here, when the combined codes are both expressed by 1,0011, 1,011 is transmitted, and when those are expressed by 111111, 11111 is transmitted. The original COD is not transmitted. In the residual cases, the original codes of VLC and COD are transmitted without change. Thus, the information field of the COD is extended to be more robustly applied to the error allowable mode.
The present invention is not limited to the abovedescribed embodiment, and it is apparent that modifications may be effected by those skilled in the art within the spirit of the present invention. For example, it is apparent to those skilled in the art that the COD field can be expressed by 2 bits or more in the method of representing encoding when coding video information. Also, determination of a channel with errors, and determination of whether an image moves under a constant background, are obvious to those skilled in the art, so they will not be described in detail. Here, these two determinations are applied to the method of represent encoding when coding video information.
According to the present invention as described above, in a channel with errors, a COD field is extended, and the extended COD field can be used in an error allowable mode. Also, video information can be encoded in
1 - 6 a smaller amount of bits under the background where an image makes a regular movement, than the conventional art.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
novel one, disclosed in thiE The invention is not restricted to the details of the foregoing embodiment (s). The invention extends to any or any novel combination, of the features specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
7

Claims (9)

  1. A method for representing encoding whenvideo information is coded, characterized in that an image is encoded by extending a code (COD) field which is used in a bit stream to indicate the cases where neither a motion vector (MV) nor a discrete cosine transform (DCT) value are encoded, where both the MV and the DCT value are encoded, and where only the MV is encoded.
  2. 2. The method of claim 1, wherein said extended code field comprises at least two bits.
  3. 3. The method of claim 1 or 2, wherein said extended code field is used in H.263 or MPEG-4 encoding standards.
  4. 4. The method of claim 1, 2 or 3 wherein when the COD field has a bit value of 111 ill, it indicates that neither the MV nor the DCT value are encoded, when the COD field has a bit value of 110 011, it indicates that both the MV and the DCT are encoded, and when the COD field has a bit value of 110 111, it indicates that only the MV is encoded.
  5. 5. The method of claim 4, wherein when an error exists in a channel, only the two values of 110011 and 111111 are used in an error allowable mode.
  6. 6. The method of claim 5, wherein when packetized data is divided and transmitted in the error allowable mode, the number of 1,111 of the COD field in a packet is encoded using variable length coding MC) and transmitted before the COD field without transmitting the original COD, and when the combined code has a bit value of 110 011, @foil is transmitted, and when the combined code has a bit value of 111 ill, 1,111 is transmitted, and in the cases of the other -1 8 combinations, the original codes of VLC and COD are transmitted without change.
  7. 7. The method of claim 4, wherein information is encoded by using only MV, under the background in which the motion of an image is regular.
  8. 8. A method for representing encoding, substantially as hereinbefore described.
  9. 9. A method for representing encoding, substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.
GB9826210A 1997-12-01 1998-12-01 Method for representing encoding upon coding video information Expired - Lifetime GB2331886B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6701497P 1997-12-01 1997-12-01

Publications (4)

Publication Number Publication Date
GB9826210D0 GB9826210D0 (en) 1999-01-20
GB2331886A true GB2331886A (en) 1999-06-02
GB2331886A8 GB2331886A8 (en) 1999-07-15
GB2331886B GB2331886B (en) 2000-01-26

Family

ID=22073174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9826210A Expired - Lifetime GB2331886B (en) 1997-12-01 1998-12-01 Method for representing encoding upon coding video information

Country Status (5)

Country Link
JP (2) JP3464397B2 (en)
KR (2) KR100322594B1 (en)
CN (1) CN1144470C (en)
DE (1) DE19855451B4 (en)
GB (1) GB2331886B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7400684B2 (en) 2000-05-15 2008-07-15 Nokia Corporation Video coding

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100644576B1 (en) * 1999-10-19 2006-11-13 삼성전자주식회사 Digital video coding method and device therefor
KR100731492B1 (en) * 2000-12-04 2007-06-21 주식회사 케이티 Apparatuses for Video Encoder having the Functions of Multi-Channel/Multi-Level Motion Detection and Motion Detection Method
KR100585710B1 (en) * 2002-08-24 2006-06-02 엘지전자 주식회사 Variable length coding method for moving picture
KR101664125B1 (en) 2009-09-22 2016-10-10 삼성전자주식회사 System and method for image encoding capable of random access

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996032717A1 (en) * 1995-04-13 1996-10-17 Siemens Aktiengesellschaft Method and device for storing, searching for and playing back audiovisual data and data files
GB9600804D0 (en) * 1996-01-17 1996-03-20 Robb Garry D Multiphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7400684B2 (en) 2000-05-15 2008-07-15 Nokia Corporation Video coding
SG147299A1 (en) * 2000-05-15 2008-11-28 Nokia Corp Video coding

Also Published As

Publication number Publication date
CN1144470C (en) 2004-03-31
KR20010088880A (en) 2001-09-28
CN1243392A (en) 2000-02-02
JP2002238051A (en) 2002-08-23
KR19990062700A (en) 1999-07-26
JP3464397B2 (en) 2003-11-10
GB2331886B (en) 2000-01-26
KR100322594B1 (en) 2002-03-08
GB2331886A8 (en) 1999-07-15
JPH11262014A (en) 1999-09-24
DE19855451A1 (en) 1999-06-10
GB9826210D0 (en) 1999-01-20
DE19855451B4 (en) 2004-08-19
JP3803296B2 (en) 2006-08-02

Similar Documents

Publication Publication Date Title
CN1795679B (en) Method, apparatus and system for encoding and decoding side information for multimedia transmission
CA1251276A (en) Method and arrangement of coding digital image signals utilizing interframe correlation
CA2023543C (en) Adaptive quantization coder/decoder with limiter circuitry
Lam et al. An error concealment algorithm for images subject to channel errors
Brady MPEG-4 standardized methods for the compression of arbitrarily shaped video objects
CN1848956B (en) Error concealing method for improving error concealing of video encoding and encoder
EP2257070B1 (en) Image coder
GB2332115A (en) Motion vector prediction method
CA2303516A1 (en) Transcoding video signals from a scheme using a prediction using backward motion vectors to a scheme using reversed backward motion vectors
WO2000002392A3 (en) Scalable video coding system
WO2003043346A8 (en) Image encoding method, image decoding method, image encoder, image decode, program, computer data signal, and image transmission system
CN101754016B (en) Method for insertion of data, method for reading of inserted data
US20020176498A1 (en) Selective prediction for intra-coding video data block
US5845012A (en) Apparatus for encoding an image signal having a still object
JPH06501346A (en) Error protection for VLC encoded data
KR960036756A (en) Image signal coding apparatus using vector quantization
GB2331886A (en) Representation of type of coded information in coded video data
KR20060038189A (en) Method and apparatus for context-based adaptive binary arithmetic coding
US7177355B1 (en) Method for representing encoding upon coding information
CN112449186B (en) Encoding method, decoding method, corresponding devices, electronic equipment and storage medium
US6553149B1 (en) Shape information coding and decoding apparatus for adaptively bordering and method therefor
Sadka et al. Aspects of error resilience for block-based video coders in multimedia communications
KR100285592B1 (en) Image signal encoding method and apparatus
Kim et al. Error Recovery in Facsimile without Retransmission.
CN101310530A (en) Multimedia coding techniques for transitional effects

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20181130