A video compression method and device
A technology for video compression and target video, which is applied in the field of video processing and can solve problems such as large amount of calculation.
Active Publication Date: 2019-10-22
北京航天安网科技有限公司
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[0003] The embodiment of the present invention provides a video compression method and device, which solves the technical problem of large amount of calculation in the quantization process in the prior art when digital video is compressed, thereby improving the compression efficiency
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[0047] Embodiments of the present invention provide a video compression method and device to solve the technical problem in the prior art that the quantization process has a large amount of calculation when compressing digital video. The general idea is as follows:
[0048] The M transformation coefficient matrices obtained by the DCT transformation process are processed by the quantization processing method of the operation order of the offset operation, the product operation, and the displacement operation, thereby avoiding the offset operation of the large-value parameters after the product operation, so that The calculation amount of the quantization operation process is reduced, thereby improving the video compression efficiency.
[0049] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understo...
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The invention discloses a video compression method and device applied to the video processing field; the method comprises the following steps: segmenting target video frames into M original pixel subblocks, calculating every two adjacent original pixel subblocks of the M original pixel subblocks, thus obtaining M residual error blocks matched with the M original pixel subblocks one by one; carrying out one-dimension DCT transformation treatment for two times for each of the M residual error blocks, thus obtaining M transformation coefficient matrixes matched with the M residual error blocks one by one; carrying out quantification process including bitwise and operation, product operation, and displacement operation in sequence for each of the M transformation coefficient matrix, thus obtaining primarily compressed image data of the target video frames. The method and device can solve the technical problems that an existing method is large in computational complexity when compressing the digit video, thus reducing the quantification operation process computational complexity, and further improving the compression efficiency.
Description
technical field [0001] The invention relates to the field of video processing, in particular to a video compression method and device. Background technique [0002] According to the ITU-T H.264 recommendation, in the video codec, the video will be transformed from the time domain to the frequency domain. The function of the transformation is to transform the image signal described in the space domain to the frequency domain, and then encode the transformed coefficients. deal with. In general, images have a strong correlation in space, and transforming them to the frequency domain can achieve decorrelation and energy concentration. Commonly used orthogonal transforms include discrete Fourier transform, discrete cosine transform and so on. Discrete cosine transform is widely used in the process of digital video compression, but the calculation of quantization process is relatively large when applying discrete cosine transform to compress digital video, resulting in low compr...
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IPC IPC(8): H04N19/625H04N19/124H04N19/176
Inventor 徐超
Owner 北京航天安网科技有限公司