Video frame coding method, video frame coding device and device with storage function
A coding method and video frame technology, applied in the field of video coding, can solve the problems of poor bit rate control performance, large deviation in the value of the quantization parameter QP between frames, and low bit rate matching accuracy, so as to improve the matching accuracy and improve the Accurate effect of performance and quantitative parameters
Active Publication Date: 2021-07-09
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology
[0003] Existing code rate control methods usually do not consider the time sequence correlation between frames, resulting in a large deviation in the value of the quantization parameter QP between frames, resulting in a low rate matching accuracy rate and poor rate control performance.
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no. 1 example
[0022] Such as figure 1 As shown, the first embodiment of a video frame encoding method of the present application includes:
[0023] S11: Obtain a current frame, where the current frame is a video frame other than the first frame.
[0024] The video frame encoding is usually to encode a series of continuous video frames, and the first frame of the continuous video frames is usually encoded backwards in time sequence.
[0025] Since the prediction network that predicts the quantization parameters of the current frame needs to obtain the frame information of the video frame before the current frame, the first video frame does not use the prediction network to predict the quantization parameters, but uses the preset fixed quantization parameters for encoding. Or other methods are used to obtain quantization parameters for encoding. The current frame is the subsequent video frame after the first video frame.
[0026] Optionally, before step S11, including:
[0027] S10: Encod...
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The present application discloses a video frame coding method, video frame coding equipment and a device with a storage function. The coding method includes: obtaining the current frame, which is a video frame other than the first frame; preprocessing the current frame to obtain the current A variety of frame information of the frame; analyze the various frame information as time-type feature parameters to obtain the multi-dimensional input characteristics of the quantization parameter prediction network, input the quantization parameter prediction network to predict the quantization parameters of the current frame, where the quantization parameter prediction network is A pre-trained neural network; use the quantization parameters of the current frame to encode the current frame to obtain the corresponding video code stream. Through the above method, the present application can improve the performance of code flow control.
Description
technical field [0001] The present application relates to the technical field of video coding, in particular to a video frame coding method, a video frame coding device and a device with a storage function. Background technique [0002] The amount of video image data is relatively large, and it usually needs to be compressed. The compressed data is called a video code stream, and the video code stream is transmitted to the client through a wired or wireless network, and then decoded and watched. The whole system includes encoding, transmission, decoding and other processes. Due to the limitations of hardware and other conditions in these processes, such as the upper limit of network transmission, it is usually hoped that the code rate should be as small as possible while maintaining the encoded video. Image quality is unchanged or even improved. The size of the compressed video frame is related to the parameters selected by the encoder during the encoding process. Among the...
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IPC IPC(8): H04N19/124H04N19/172H04N19/44H04N19/70
CPCH04N19/124H04N19/172H04N19/44H04N19/70
Inventor 张政腾林聚财殷俊
Owner ZHEJIANG DAHUA TECH CO LTD