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
  • H04N19/102—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
  • H04N19/124—Quantisation
• • 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
  • H04N19/119—Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• • 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
  • H04N19/146—Data rate or code amount at the encoder output
  • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
• • 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
  • H04N19/174—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 slice, e.g. a line of blocks or a group of blocks
• • 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

Definitions

• a method of display link video compression that comprises coding a block within a slice of video data, the slice comprising one or more blocks of the video data, storing bits corresponding to the block in a buffer, determining information indicative of a position of the block within the slice, and determining fullness of the buffer based at least in part on the position of the block within the slice.
• FIG. 2B is a block diagram illustrating an example of a video decoder that may implement techniques in accordance with aspects described in this disclosure.
• FIG. 3 is a graph showing an exemplary process for encoding slices of data.
• this disclosure relates to methods of improving video compression techniques such as those utilized in display link video compression. More specifically, the present disclosure relates to systems and methods for providing constant bit rate (CBR) output and/or input of a buffer (e.g., a rate buffer) for display link video compression.
• CBR constant bit rate
• embodiments disclosed herein may be applicable to any suitable video coding standard.
• embodiments disclosed herein may be applicable to one or more of the following standards: International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T) H.261, International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Moving Picture Experts Group- 1 (MPEG-1) Visual, ITU-T H.262 or ISO/IEC MPEG-2 Visual, ITU-T H.263, ISO/IEC MPEG-4 Visual, ITU-T H.264 (also known as ISO/IEC MPEG-4 AVC), High Efficiency Video Coding (HEVC), and any extensions to such standards.
• the techniques described in this disclosure may become part of standards developed in the future. In other words, the techniques described in this disclosure may be applicable to previously developed video coding standards, video coding standards currently under development, and forthcoming video coding standards.
• the DSC standard is different from other video coding standards, such as H.264 and HEVC.
• DSC includes intra-frame compression, but does not include inter- frame compression, meaning that temporal information may not be used by the DSC standard in coding the video data.
• other video coding standards may employ inter-frame compression in their video coding techniques.
• video coding system 10 includes a source device 12 (i.e., "video coding device 12" or “coding device 12") that generates encoded video data to be decoded at a later time by a destination device 14 (i.e., "video coding device 14" or “coding device 14").
• a source device 12 i.e., "video coding device 12" or “coding device 12”
• a destination device 14 i.e., "video coding device 14" or “coding device 14"
• the source device 12 and destination device 14 constitute separate devices. It is noted, however, that the source device 12 and destination device 14 may be on or part of the same device, as shown in the example of FIG. IB.
• the WWAN carriers may include, for example, wireless communication networks such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), Single-Carrier FDMA (SC-FDMA) and other networks.
• CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA2000, etc.
• UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
• CDMA2000 covers IS-2000, IS-95 and IS-856 standards.
• a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM).
• GSM Global System for Mobile Communications
• the video encoder 20 may partition a picture into a plurality of slices.
• Each of the slices may include a spatially distinct region in an image (e.g., a frame) that can be decoded independently without information from the rest of the regions in the image or frame.
• Each image or video frame may be encoded in a single slice or each image or video frame may be encoded in several slices.
• the number of bits allocated to encode each slice may be substantially constant.
• the video encoder 20 may perform encoding operations on each slice of the picture.
• the video encoder 20 may generate encoded data associated with the slice.
• the encoded data associated with the slice may be referred to as a "coded slice.”
• the color-space 105 converter may convert an input color-space to the color-space used in the coding implementation.
• the color-space of the input video data is in the red, green, and blue (RGB) color-space and the coding is implemented in the luminance Y, chrominance green Cg, and chrominance orange Co (YCgCo) color-space.
• the color-space conversion may be performed by method(s) including shifts and additions to the video data. It is noted that input video data in other color-spaces may be processed and conversions to other color- spaces may also be performed.
• the rate controller 120 determines a set of coding parameters, e.g., a QP.
• the QP may be adjusted by the rate controller 120 based on the BF of the rate buffer 150 and image activity of the video data in order to maximize picture quality for a target bitrate which ensures that the rate buffer 150 does not overflow or underflow.
• the rate controller 120 also selects a particular coding option (e.g., a particular mode) for each block of the video data in order to achieve the optimal rate-distortion performance.
• the rate controller 120 minimizes the distortion of the reconstructed images such that the distortion satisfies the bit-rate constraint, i.e., the overall actual coding rate fits within the target bit rate.
• the line buffer 130 holds the output from the predictor, quantizer, and reconstructor component 125 so that the predictor, quantizer, and reconstructor component 125 and the indexed color history 135 can use the buffered video data.
• the indexed color history 135 stores recently used pixel values. These recently used pixel values can be referenced directly by the video encoder 20 via a dedicated syntax.
• Init_enc_delay can be selected to align the ending events (e.g., end of encoding and transmission) of the first slice 315 with the beginning events (e.g., beginning of encoding and transmission) of the second slice 320. That is, the Init_enc_delay period for the second slice 320 may correspond to the flush period, Flush_time, for the first slice 315.
• the process 500 may involve storing one or more bits corresponding to the block in a rate buffer 150.
• blocks may be compressed and the corresponding bits may be temporarily stored in the rate buffer 150.
• individual bits may be added to the buffer 150 after being coded.
• multiple bits may be added to the buffer 150 simultaneously.
• Information and signals disclosed herein may be represented using any of a variety of different technologies and techniques.
• data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

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• Signal Processing (AREA)
• Compression Or Coding Systems Of Tv Signals (AREA)

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• 2015
  • 2015-08-06 US US14/820,404 patent/US9979970B2/en active Active
  • 2015-08-07 EP EP15753563.4A patent/EP3178227A1/en not_active Withdrawn
  • 2015-08-07 KR KR1020177003142A patent/KR102082554B1/ko active Active
  • 2015-08-07 CA CA2953875A patent/CA2953875C/en active Active
  • 2015-08-07 WO PCT/US2015/044252 patent/WO2016022938A1/en not_active Ceased
  • 2015-08-07 CN CN201580042158.8A patent/CN106664406B/zh active Active
  • 2015-08-07 JP JP2017506726A patent/JP6644766B2/ja active Active
  • 2015-08-07 BR BR112017002185-4A patent/BR112017002185B1/pt active IP Right Grant

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