Efficient H264 decoding method

Abstract

The invention discloses an efficient H264 decoding method. The efficient H264 decoding method comprises the following steps: receiving first frame of image data after encoding, leading the first frame of image data into a buffer area of a decoder, copying the first frame of image data continuously until the whole buffer area is filled with the first frame of image data; decoding the first frame of image data when the buffer area meets the decoding requirement of the decoder, leading a second frame of image data into the buffer area, decoding the second frame of image data, and repeating the steps until decoding the last frame of image data. The first frame of image data are rapidly copied so that the buffer area can be filled as soon as possible, then the decoding requirement of the decoder is met, decoding of the first frame of image data is remarkably accelerated, decoding delay time is shortened effectively, and decoding efficiency is improved.

Description

technical field [0001] The invention relates to a decoding method of image data, in particular to an efficient H264 decoding method. Background technique [0002] At present, there are two international organizations that formulate video codec technology, one is "ITU-T", and the standards it formulates include H.261 (ie H261), H.263 (ie H263), H. 263+ (that is, H263+), etc., and the other is the "International Organization for Standardization (ISO)", which has developed standards such as MPEG-1, MPEG-2, and MPEG-4. [0003] H.264, or H264, is a new digital video coding standard formulated by the Joint Video Team (JVT) jointly established by two organizations, so it is both ITU-T's H264 and ISO / IEC's MPEG-4 advanced video coding (Advanced Video Coding, AVC), and it will become part 10 of the MPEG-4 standard. Therefore, whether it is MPEG-4AVC, MPEG-4Part10, or ISO / IEC14496-10, it refers to H264. [0004] The biggest advantage of H264 is that it has a high data compression ...

AI Technical Summary

Problems solved by technology

[0014] Because H264 uses a variety of prediction algorithms to improve its compression rate, it causes delay defects in traditional decoding techniques

When the H264 decoding method decodes a frame of image, it needs to perform forward and backward multi-party prediction on a frame of image to solve the complete video data. It is precisely because of this necessary mechanism that the H264 decoder needs to continuously decode Fill your own buffer (buffer), and you cannot decode some frames of images before the buffer is filled completely, so the traditional decoding method needs to wait for enough frames of images to fill the buffer before decoding the first frame of images, so it will large delay

[0015] In addition, due to the addition of the decoder mechanism, in the traditional decoding method, when decoding the frame loss on the network, the original buffer must be cleared after the key frame is cleared, and the decoding display is performed again, so the phenomenon of blurred screen and mosaic will be caused due to lack of data

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