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Video decoding method for saving storage space

A video decoding and storage area technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problems of data redundancy, stored data cannot be displayed, etc., to reduce storage space and save bandwidth overhead.

Active Publication Date: 2012-07-11
青岛海永顺创新科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, video files are becoming more and more clear, and the resolution is getting higher and higher. The FULL HD size video has a resolution of 1920*1080, which requires a lot of storage space to store intermediate data during decoding. However, At present, the resolution of most playback devices is far smaller than the resolution of the video itself, which results in a large amount of stored data that cannot actually be displayed, resulting in data redundancy

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Embodiment Construction

[0019] For general video files (such as MPEG-2, MPEG-4, AVS, etc.), the encoding sequence of each reference frame is an I frame followed by a P frame, and there are 0 to multiple B frames between two P frames. Such as I, P, B, B, P, B, B, B, P, B... structure, where I is an I frame, P is a P frame, and B is a B frame.

[0020] Now each reference frame (comprising I frame, P frame, B frame) in the video file is numbered, that is, I, P, B, B, P, B, B, B, P, B... Each frame in the structure is numbered. The numbering rule is that I frames and P frames are represented by one digit, B frames are represented by two digits, and I frames are numbered sequentially from 0, P frames are numbered sequentially from 1, and the first digit of the B frame and the preceding P The frames are the same, with the second digit numbered sequentially starting from 1. Therefore, I, P, B, B, P, B, B, B, P, B... can be expressed as I0, P1, B11, B12, P2, B21, B22, B23, P3, B31.  … It can be seen that ...

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Abstract

The invention relates to a video decoding method for saving storage space. The method comprises the following steps of: firstly, decoding a first I frame in a video file, and storing the I frame; secondly, decoding a first P frame by using the I frame as a reference, and storing the P frame; thirdly, compressing frame data not serving as a subsequent reference frame, storing the compressed data, and simultaneously deleting the earliest stored frame data; fourthly, decoding all B frames before subsequent P frames in turn by using the first P frame data and the compressed data as references, and compressing B frame data respectively; and finally, deleting all the frames in a storage area, and decoding the next P frame by using the current uncompressed P frame as a reference until each frameof the data in the video file is decoded. The video decoding method greatly reduces the storage space needed by video decoding, and can be widely used for decoding video files with the formats such as MPEG-2, MPEG-4, AVS and the like.

Description

technical field [0001] The invention relates to video decoding technology, in particular to a video decoding method for saving storage space. Background technique [0002] With the rapid development of digital products, more and more electronic products have video playback functions, such as PMP, mobile phones, digital photo frames, GPS and so on. These electronic products often have the function of playing video files in formats such as MPEG-2, MPEG-4, and AVS. Usually, this kind of video file is to divide the video into a frame of images and then use it as a frame, and achieve compression through two methods of inter-frame compression and intra-frame compression. [0003] Currently, there are three different frame types, which are I-frames, P-frames, and B-frames. Among them, the I frame is a key frame, and the I frame can be decoded independently without referring to the data of other frames; the P frame is a unidirectional predictive frame, which needs to be decoded by...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/423
Inventor 史岩
Owner 青岛海永顺创新科技股份有限公司