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A video encoding and decoding method and system

A video encoding and video decoding technology, applied in the field of video encoding and decoding methods and systems, can solve problems such as performance bottlenecks, and achieve the effects of improving performance, increasing multiplexing rate, and reducing external memory bandwidth occupancy.

Active Publication Date: 2018-04-20
ZTE CORP
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Problems solved by technology

At present, the theoretical bandwidth of DDR3-160064bit is only 12GB, and the actual bandwidth is less than 10GB, which will obviously create a performance bottleneck

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  • A video encoding and decoding method and system
  • A video encoding and decoding method and system
  • A video encoding and decoding method and system

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Embodiment Construction

[0075] The basic idea of ​​the present invention is: the encoder divides the current coded image or coded image Tile into one or more GOCs; within each GOC, encodes each coding unit according to the ZigZag scanning order; The number of rows or columns of coding units is written into the code stream; the decoding end divides the current decoded image or decoded image Tile into one or more GOCs; obtains the number of rows of coding units or columns of coding units contained in the GOC from the code stream, and Within each GOC, each coding unit is decoded according to the ZigZag scanning order according to the number of coding unit rows or coding unit columns.

[0076] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0077] The present invention provides a video encoding method, including a video encoding method in full frame mode and a video encoding method in Tile mode.

[0078] Figure 6 I...

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Abstract

The present invention discloses a video encoding and decoding method and system. The system includes: the video encoding subsystem divides the current encoded image or encoded image Tile into one or more coding unit groups (GOC); Type (ZigZag) scanning sequence to encode each coding unit; write the number of coding unit rows or coding unit columns contained in the GOC into the code stream; the video decoding subsystem divides the current decoded image or decoded image Tile into one or more GOC; obtain the number of coding unit rows or coding unit columns contained in the GOC from the code stream, and according to the number of coding unit rows or coding unit columns inside each GOC, perform a ZigZag scan sequence for each coding unit to decode. According to the technical solution of the present invention, the multiplexing rate of the reference frame in the motion search of the video encoding can be increased, the bandwidth occupation of the external memory can be reduced, and the performance of the video encoding and decoding chip can be improved.

Description

technical field [0001] The invention relates to network television technology in the communication field, in particular to a video encoding and decoding method and system. Background technique [0002] At present, inter-frame prediction functions are included in advanced video coding standards. Inter-frame prediction uses the reconstructed images of adjacent frames to predict the current frame to better eliminate temporal redundancy between images. Such as figure 1 As shown, inter-frame prediction is divided into forward-prediction P-frames and bidirectional-prediction B-frames. Search for the current frame coding unit in the reference frame (the coding unit can be the coding unit (CU, Coding Unit) or the largest coding unit (LCU, Large Coding Unit) in the HEVC standard, or it can be a macro in standards such as H.264 Module (MB, MacroBlock) or macroblock pair (MBP, MacroBlock Pair)) is the closest coding unit, this coding unit is used as the prediction value of the curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/129H04N19/573H04N19/44
Inventor 梁立伟王宁
Owner ZTE CORP
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