Classifications

• • 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
  • H04N19/1887—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 a variable length codeword
• • 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
  • H04N19/102—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
  • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
• • 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
  • H04N19/189—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
• • 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

Definitions

• the invention relates generally to video processing.
• the present invention relates to methods and apparatuses of intra mode coding for High Efficiency
• HEVC Video Coding
• HEVC High Efficiency Video Coding
• JCT-VC Joint Collaborative Team on Video Coding
• the prediction unit (PU) for intra coding can be 64x64, 32x32, 16x16, 8x8, and 4x4.
• 35 intra prediction modes i.e., mode 0 ⁇ mode 34 in Fig. 1, are used for all PU sizes.
• mode 35 Intra FromLuma is only used for chroma component when chroma_pred_from_luma_enabled_flag is equal to 1.
• candModeList[0] and candModeList[l] are derived as follows:
• candModeList[0] candlntraPredModeA (7)
• candModeList[l] candlntraPredModeB (8)
• candModeList[2] is set equal to Intra Planar
• candModeList[2] is set equal to Intra DC
• candModeList[2] is set equal to Intra Angular (26).
• candlntraPredModeA or candlntraPredModeB is set equal to Intra DC.
• IntraPredMode If the current intra mode (denoted as IntraPredMode) is equal to any of the most probable modes in candModeList, a flag prev_intra_pred_flag equal to 1 is transmitted followed by the index of the mode that is identical to IntraPredMode in candModeList; otherwise, the remaining mode of IntraPredMode (denoted as rem_intra_luma_pred_mode) is transmitted following the flag prev_intra_pred_flag equal to O.
• candModeList[l] and candModeList[2] corresponding to each possible candlntraPredModeA are given in Table 1.
• candlntraPredModeA is equal to 33
• its upper neighbor candModeList[2] is mode 2.
• the upper neighbor of mode 33 should be 34, which will be consistent with some other modes except mode 34 (mode 34 has no upper neighbor).
• candModeList[l] and candModeList [2] correspond to each possible candlntraPredModeA if candlntraPredModeB is equal to candlntraPredModeA and candlntraPredModeA is not less than 2.
• Fig. 1 is a diagram illustrating the intra prediction mode directions.
• candModeList[2] is derived as below:
• candModeList[l] and candModeList[2] corresponding to each possible candlntraPredModeA are derived with Equations (4), (5) and (9). They are given in Table 2.
• candlntraPredModeA is equal to 33
• its upper neighbor candModeList[2] is set to be mode 34.
• candModeList[l] and candModeList[2] correspond to each possible candlntraPredModeA if candlntraPredModeB is equal to candlntraPredModeA and candlntraPredModeA is not less than 2.
• an embodiment of the present invention can be a circuit integrated into a video compression chip or program codes integrated into video compression software to perform the processing described herein.
• An embodiment of the present invention may also be program codes to be executed on a Digital Signal Processor (DSP) to perform the processing described herein.
• DSP Digital Signal Processor
• the invention may also involve a number of functions to be performed by a computer processor, a digital signal processor, a microprocessor, or field programmable gate array (FPGA).
• processors can be configured to perform particular tasks according to the invention, by executing machine-readable software code or firmware code that defines the particular methods embodied by the invention.
• the software code or firmware codes may be developed in different programming languages and different format or style.
• the software code may also be compiled for different target platform.
• different code formats, styles and languages of software codes and other means of configuring code to perform the tasks in accordance with the invention will not depart from the spirit and scope of the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Computing Systems (AREA)
• Theoretical Computer Science (AREA)
• Compression Or Coding Systems Of Tv Signals (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=49382789

Family Applications (1)

Country Status (1)

Cited By (1)

Citations (2)

• 2012
  • 2012-04-16 WO PCT/CN2012/074129 patent/WO2013155666A1/fr not_active Ceased

Patent Citations (2)

Non-Patent Citations (1)

Similar Documents

Legal Events