Mobile video code rate control method based on 2.5G wireless network
A mobile video and bit rate control technology, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve problems such as video transmission performance degradation, and achieve the effect of ensuring quality
Inactive Publication Date: 2015-12-23
CHENGDU GOLDENWAY ELECTRONICS
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Although the above two algorithms have good coding effects in medium and high bit rate environments, the quality of video transmission is greatly reduced in environments such as unstable network bandwidth, low latency and low bit rate, and violent movement of video sequences.
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[0015] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0016] refer to figure 1 , figure 1 A flowchart of an embodiment of a method for controlling mobile video code rates based on a 2.5G wireless network is shown. Such as figure 1 As shown, the mobile video code rate control method based on 2.5G wireless network comprises the following steps:
[0017] Using the image grayscale binarization method, preprocessing to obtain the binarized image of each frame image in the video ...
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The invention discloses a mobile video code rate control method based on a 2.5G wireless network. The method comprises the steps that an image gray binaryzation method is used to carry out preprocessing to acquire the binaryzation image of each image in a video to be compressed; the complexity of the binaryzation image of the current frame is calculated; the current full scale of the buffer zone of a coded frame, the threshold of the default binaryzation image complexity and a default full scale threshold are acquired and stored; and if the threshold of the default binaryzation image complexity is less than the current frame complexity, or the threshold of the default binaryzation image complexity is greater than the current frame complexity, the current full scale is greater than or equal to the default full scale threshold and the number of compiled frames consecutively abandoned is greater than the default threshold of the number of frames, the actual code rate of the current frame is calculated based on a weighted value dynamically produced by the 2.5G network.
Description
technical field [0001] The invention relates to video image compression technology, in particular to a method for controlling mobile video code rate based on 2.5G wireless network. Background technique [0002] At present, wireless communication products have been more and more commonly used in various fields of people's daily life and work. In order to meet people's needs in 2.5G wireless network video applications, there are currently two main bit rate control algorithms. The improved algorithm of the TM5 version in MPEG-2 is applied to JVT-F086. It uses the TM5 model and is divided into four steps: bit allocation, first rate-distortion optimization, quantization parameter calculation and rate-distortion optimization again. The second is an algorithm improved by the VM8 version of MPEG-4, which is applied to JVT-G012. It is proposed to use the traffic round-trip model to allocate the number of bits, and use the quadratic rate-distortion function to calculate the quantizati...
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IPC IPC(8): H04N19/146H04N19/142
Inventor 张毅
Owner CHENGDU GOLDENWAY ELECTRONICS