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Video reference frame read-write method for low-on-chip memory

A reading and writing method and a technology of reference frames, which are applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve the problem of large occupied space, and achieve the effect of reducing the occupancy rate, changing the storage method, and improving the reading and writing speed.

Inactive Publication Date: 2019-07-19
FOSHAN SHUNDE SUN YAT SEN UNIV RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When using an FPGA with a large on-chip memory, the storage method used is to store both the reference frame and the current frame at the same time, which requires a large space.

Method used

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  • Video reference frame read-write method for low-on-chip memory
  • Video reference frame read-write method for low-on-chip memory
  • Video reference frame read-write method for low-on-chip memory

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Embodiment 1

[0024] In the traditional method, the number of macroblocks in a frame of pictures is set as MxN, and the space occupied by a macroblock is 1. When the current frame is not encoded, the total space occupied is the space occupied by the reference frame MN. Scan the macroblock of the current frame in the direction indicated by the arrow and perform encoding. Every time a macroblock is coded, a new storage space is opened to store the reconstructed macroblock of the coded macroblock. After the coding of the last macroblock is completed, the total storage space occupied is 2MN. Such as figure 1 A schematic diagram of the reference frame and the current frame is shown.

[0025] The invention as figure 2 Shown, a kind of video reference frame reading and writing method of low on-chip memory, described method comprises the following steps:

[0026] S1: Divide the frame picture to be processed into MxN macroblocks according to the preset size MxN. In this embodiment, the values ​...

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Abstract

The invention discloses a video reference frame read-write method for a low-on-chip memory, and the method comprises the following steps: dividing a to-be-processed frame picture into M*N macro blocksaccording to a preset size M*N, and enabling M and N to be respectively the number of transverse and longitudinal macro blocks of the frame picture; taking the top macro block at the left upper corner of the frame picture as a scanning initial macro block, scanning line by line according to a sequence from left to right, and carrying out compressed encoding on all the macro blocks one by one according to a scanning sequence; decoding and reconstructing the coded macro block to be used as a reference macro block of the next frame of video data; the decoded and reconstructed data covering the encoded macro blocks which are not referenced any more. After all the macro blocks are coded, the total space occupied by the macro blocks on the chip is MN+M+1. By changing the storage mode of the reference frame macro block, the occupancy rate of the on-chip memory is reduced, so that the read-write speed of data is increased.

Description

technical field [0001] The invention relates to the field of video compression, in particular to a method for reading and writing video reference frames with low on-chip memory. Background technique [0002] In video compression coding, it involves the storage method of reference frames. Nowadays, because the on-chip memory of most FPGA series is small, it is not enough to store the reference frame picture of the next frame of the current frame and the picture after encoding the current frame by one frame. Therefore, off-chip memory is used to store reference frames. The data read and write speed of off-chip storage is slower than that of on-chip storage. [0003] When an FPGA with a large on-chip memory is used, the storage method used is to store both the reference frame and the current frame at the same time, which requires a large space. Contents of the invention [0004] The present invention provides a video reference frame with low on-chip memory in order to over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/172H04N19/129H04N19/423H04N19/426
CPCH04N19/129H04N19/172H04N19/176H04N19/423H04N19/426
Inventor 毛忍王军
Owner FOSHAN SHUNDE SUN YAT SEN UNIV RES INST