DE60345459C5 - Intracodierung auf der basis räumlicher prädiktion - Google Patents

Intracodierung auf der basis räumlicher prädiktion Download PDF

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DE60345459C5
DE60345459C5 DE60345459.3A DE60345459A DE60345459C5 DE 60345459 C5 DE60345459 C5 DE 60345459C5 DE 60345459 A DE60345459 A DE 60345459A DE 60345459 C5 DE60345459 C5 DE 60345459C5
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prediction modes
group
prediction
current block
spatial
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Marta Karczewicz
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Nokia Technologies Oy
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Nokia Technologies Oy
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    • 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
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • H04N19/463—Embedding additional information in the video signal during the compression process by compressing encoding parameters before transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • 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
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
    • 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
    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/11—Selection of coding mode or of prediction mode among a plurality of spatial predictive coding modes
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/196—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters
    • 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
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/196—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters
    • H04N19/197—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters including determination of the initial value of an encoding 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A method of coding into a bitstream image information comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of spatial prediction modes of a plurality of neighboring blocks of the current block, said method characterized by comprisingdividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block, m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, andcoding into the bitstream information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes.

Claims (26)

  1. A method of coding into a bitstream image information comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of spatial prediction modes of a plurality of neighboring blocks of the current block, said method characterized by comprising dividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block, m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, and coding into the bitstream information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes.
  2. The method of claim 1, further characterized by ordering the prediction modes of the first group of prediction modes according to the probability of occurrence among the prediction modes of the first group of prediction modes.
  3. The method of claim 1, further characterized by arranging the predictions modes of the second group of prediction modes in a predetermined fashion known to a decoding device.
  4. The method of claim 1, further characterized by coding into the bitstream information indicative of which prediction mode of the first group of prediction modes has a highest probability of occurrence when the prediction mode with the highest probability of occurrence from the first group of prediction mode is selected for use in coding the current block.
  5. The method of claim 1, further characterized in that an ordered list of prediction modes is known to a decoding device so that the decoding device determines an order of the second group of prediction modes based on the ordered list of prediction modes.
  6. The method of claim 5, further characterized in that the ordered list of prediction modes is associated with more than one group of the spatial prediction modes of a plurality of neighboring blocks of the current block.
  7. The method of claim 1, further characterized in that the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block are represented by a plurality of different integers and the prediction modes of the second group of prediction modes are ordered according to an order of the integers known to a decoding device.
  8. The method of claim 1, wherein the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block are represented by a plurality of different integers, each integer corresponding to a prediction mode, and wherein the integers are arranged in an ascending order of the integers for providing an ordered list of prediction modes, said method comprising removing the integers corresponding to the first group of prediction modes from the ordered list for providing a modified ordered list, so as to allow a decoding device to determine the order of the second group of prediction modes based on the modified ordered list.
  9. The method of claim 5, wherein one prediction mode of said list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block is selected for use in coding the current block, said method further characterized by providing the decoding device with information indicative of a rank of the selected prediction mode among the prediction modes of the second group of prediction modes if the selected prediction mode is in the second group of prediction modes.
  10. The method of claim 1, further characterized by mapping the spatial prediction modes of the neighboring blocks for providing complementary prediction modes of the neighboring blocks when needed, to determine a complementary prediction mode of the current block based on the complementary prediction modes of the neighboring blocks, and by mapping the complementary prediction mode of the current block for obtaining the spatial prediction mode of the current block.
  11. The method of claim 10, characterized in that the mapping of a prediction mode of a block is carried out by a mirroring function.
  12. An encoding device for coding into a bitstream an image comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of spatial prediction modes of a plurality of neighboring blocks of the current block, said encoding device characterized by comprising means for dividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block, m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, wherein the first group of prediction modes is an ordered group of prediction modes and the second group of prediction modes is an ordered group of prediction modes, and means for coding into the bitstream information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes and for coding into the bitstream information indicating the position of the spatial prediction mode of the current block in the respective group of prediction modes to which the spatial prediction mode of the current block belongs.
  13. The encoding device of claim 12, further characterized by means, responsive to the first group of prediction modes, for ordering the prediction modes of the first group of prediction modes according to the probability of occurrence among the prediction modes of the first group of prediction modes for providing an ordered list.
  14. The encoding device of claim 12, further characterized by means capable of providing complementary prediction modes of the neighboring blocks when needed based on the spatial prediction modes of the neighboring blocks so that a complementary prediction mode of the current block can be determined based on the complementary prediction modes of the neighboring blocks, and means, responsive to the complementary prediction mode of the current block, for providing the spatial prediction mode of the current block based on a mapping of the complementary prediction mode of the current block.
  15. A method for decoding from a bitstream image information comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of the spatial prediction modes of a plurality of neighboring blocks of the current block, said method characterized by comprising dividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block, m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, said method characterized by decoding from the bitstream information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes.
  16. The method of claim 15, further characterized in that the prediction modes of the first group of prediction modes are ordered according to the probability of occurrence among the prediction modes of the first group of prediction modes.
  17. The method of claim 15, further characterized in that the prediction modes of the second group of prediction modes are arranged in a predetermined fashion known to a decoding device.
  18. The method of claim 15, further characterized in that the decoded information is also indicative of which prediction mode of the first prediction modes has a highest probability of occurrence when the prediction mode with the highest probability of occurrence of first group of prediction modes is selected for use in coding and decoding the current block.
  19. The method of claim 15, further characterized in that an ordered list is provided to a decoding device so as to allow the decoding device to determine an order of the prediction modes of the second group of prediction modes based on the ordered list.
  20. A decoder capable of decoding from a bitstream image information comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of the spatial prediction modes of a plurality of neighboring blocks of the current block, said decoder characterized in that the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block are divided into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, wherein the first group of prediction modes is an ordered group of prediction modes and the second group of prediction modes is an ordered group of prediction modes, said decoder comprising determining means, responsive to decoded information comprising information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes, for determining whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes according to the information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes, wherein the decoded information further comprises information indicating the position of the spatial prediction mode in the respective group of prediction modes to which the spatial prediction mode of the current block belongs, and means for selecting the spatial prediction mode based on said determining by selecting the spatial prediction mode from the determined first group or second group of prediction modes according to the information indicating the position of the spatial prediction mode of the current block in the respective group of prediction modes to which the spatial prediction mode of the current block belongs.
  21. The decoder of claim 20, further characterized in that the prediction modes of the first group of prediction modes are ordered according to the probability of occurrence among the prediction modes of the first group of prediction modes.
  22. An image coding system for coding and decoding an image comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list of available prediction modes obtained for the combination of the prediction modes of a plurality of neighboring blocks of the current block, said coding system characterized by comprising means for dividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block, m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, means, for coding into a bitstream group information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes, and means, for decoding from the bitstream said group information so as to allow a decoding device to determine the spatial prediction mode of the current block based on said decoded information.
  23. The image coding system of claim 22, further characterized by means, responsive to the first group of prediction modes, for ordering the prediction modes of the first group of prediction modes according to the probability of occurrence among the prediction modes of the group the first group of prediction modes.
  24. The image coding system of claim 22, further characterized by means, responsive to the second group of prediction modes, for arranging the prediction modes of the second group of prediction modes in a predetermined fashion known to the decoding device.
  25. A computer program for use in an image coding system for coding into a bitstream image information comprising a plurality of image blocks using a plurality of spatial prediction modes for intra-mode block prediction, wherein the spatial prediction mode of a current block is determined based on a list available of prediction modes which is obtained for a combination of spatial prediction modes of a plurality of neighboring blocks of the block, said computer program comprising a pseudo code for use in dividing the prediction modes of the list of prediction modes obtained for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block into a first group and a second group of prediction modes, the first group of prediction modes having m prediction modes and the second group of prediction modes having n-m prediction modes, wherein n is the overall number of prediction modes of the list of prediction modes for the combination of spatial prediction modes of the plurality of neighboring blocks of the current block m is smaller than n, and wherein the prediction modes of the first group of prediction modes have a higher probability of occurrence than the prediction modes of the second group of prediction modes, and a pseudo code for use in coding into the bitstream information indicative of whether the spatial prediction mode of the current block belongs to the first group or the second group of prediction modes.
  26. The computer program of claim 25, further characterized by a pseudo code for use in arranging the prediction modes of the second group of prediction modes in a predetermined fashion known to a decoding device.
DE60345459.3A 2002-06-11 2003-06-10 Intracodierung auf der basis räumlicher prädiktion Expired - Lifetime DE60345459C5 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US38806102P 2002-06-11 2002-06-11
US388061P 2002-06-11
US171467 2002-06-12
US10/171,467 US20030231795A1 (en) 2002-06-12 2002-06-12 Spatial prediction based intra-coding
US39111202P 2002-06-21 2002-06-21
US391112P 2002-06-21
US39517802P 2002-07-09 2002-07-09
US395178P 2002-07-09
EP03732786.3A EP1512115B1 (de) 2002-06-11 2003-06-10 Intracodierung auf der basis räumlicher prädiktion

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EP (1) EP1512115B1 (de)
JP (1) JP4490261B2 (de)
KR (1) KR101017094B1 (de)
CN (1) CN100380984C (de)
AU (1) AU2003240172B2 (de)
CA (1) CA2488266C (de)
DE (1) DE60345459C5 (de)
MX (1) MXPA04012133A (de)
MY (1) MY137061A (de)
TW (1) TWI239207B (de)
WO (1) WO2003105070A1 (de)

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