Encoding method and device for H.264 image group, encoding and decoding chip and electronic equipment

Abstract

The invention provides an encoding method and device for an H.264 image group, an encoding and decoding chip and electronic equipment, and the encoding method comprises the following steps: applying two frames of caches as reference frame data for reading and writing, judging the type of a current frame of the image group, initializing a writing cache address if the current frame of the image group is an I frame, and writing the reference frame data obtained through encoding into the encoding cache address; if the current frame is the P frame, judging whether the frame interval between the current frame and the reference frame closest to the previous frame is a set frame interval or not, if yes, setting the reference frame identifier as the reference frame, and otherwise, setting the reference frame identifier as a non-reference frame; writing the reference frame identifier into the frame header of the current frame; and judging whether the previous frame of the current frame is a reference frame or not, if so, assigning the read cache address as the write cache address of the previous frame, assigning the write cache address as the other one of the two coding cache addresses, andif not, keeping the read cache address and the write cache address consistent. The cache utilization rate and the read-write efficiency in the encoding and decoding process can be improved.

Description

technical field [0001] The invention relates to the field of image encoding and decoding, in particular to an encoding method, device, encoding and decoding chip and electronic equipment of an H.264 image group. Background technique [0002] With the rapid development of wireless networks, people's daily life is closely related to mobile communication, and the impact of mobile communication on people's life is also increasing. The rapid development of wireless transmission makes people have higher requirements on it in business. Some special services in some special occasions require high stability, low delay, and uninterrupted transmission, such as mobile video conferencing, video surveillance, etc. Now the wireless network also has its own weaknesses. One of the main problems is the network transmission delay and network packet loss when the bandwidth is tight, so that the video sequence at the receiving end will be abnormally decoded. [0003] Since the H.264 video comp...

AI Technical Summary

Problems solved by technology

However, the use of multiple reference frames in the development of consumer electronics-grade video chips will lead to problems such as increased encoding complexity, increased memory and bandwidth consumption, and increased chip costs.

[0006]Another technology, as disclosed in the prior art CN104754345A, introduces a plurality of non-reference frames P frames in a group of pictures, and this technology can objectively alleviate the aforementioned encoding technology. However, in this prior art, the encoded frame data is directly sent to the external buffer, and when the encoded frame data needs to be used as a reference frame, it is necessary to pass the reference frame from the off-chip buffer The reading module reads, which not only reduces the cache utilization, but also has low read and write efficiency

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