Down-sampling decoding method and device for high-resolution video on small-size display equipment
A display device and high-resolution technology, applied in digital video signal modification, TV, electrical components, etc., can solve problems such as complicated operation, poor subjective experience, and sacrifice of original video quality, so as to reduce storage space and reduce bandwidth consumption , the effect of great application value
Active Publication Date: 2012-05-02
SPREADTRUM COMM (SHANGHAI) CO LTD
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On the one hand, the second method is complicated to operate, and on the other hand, the transcoding process sacrifices the quality of the original video, and the degree of video quality degradation depends on the performance of the transcoder, so this method has a poor subjective experience.
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[0014] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0015] see figure 1 Shown, implement the flow chart of the downsampling decoding method of the high-resolution video of the present invention on the small-size display device, the method comprises the following steps:
[0016] Step S101: receiving the input encoded and compressed video code stream, and obtaining 8x8 DCT coefficient blocks after entropy decoding and inverse quantization;
[0017] Step S102: undergo IDCT transformation on the 8x8 DCT coefficient block to form a 4x4 data block. The method of IDCT transformation has been described in the prior art and will not be repeated here.
[0018] For the intra-frame coding block, step S103 is performed, that is, the 4x4 data block is saturated to form a 4x4 image in the pixel domain;
[0019] For the inter-frame coding block, the 4x4 data block is a residual block in the pixel domain, and then ...
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The invention relates to a down-sampling decoding method for a high-resolution video on small-size display equipment. The method comprises the following steps of: receiving an inputted coded and compressed video code stream, carrying out entropic decoding and inverse quantization, and then, obtaining a discrete cosine transform (DCT) coefficient block; carrying out inverse discrete cosine transform (IDCT) on the DCT coefficient block to form a data block, then saturating an intra-frame coding block so as to form images of a pixel domain; and for an interframe coding block, firstly carrying out motion-compensated interpolation with 1 / 4 pixel precision on a reference frame with 1 / 4 original resolution, adding the interframe coding block with a reference block, and saturating to form images of a pixel domain. In this way, the high-resolution video can be smoothly played on a mobile multimedia terminal of the small-size display equipment without transcoding and a special hardware decoding accelerator, and the cost for the hardware of a product can be saved under the condition that good video quality is kept.
Description
technical field [0001] The invention relates to the fields of computer image processing and video processing, in particular to a down-sampling decoding method and device for high-resolution video on a small-size display device. Background technique [0002] In recent years, multimedia terminal devices such as mobile phones and MP4 players have become more and more popular among consumers due to their portability and rich multimedia applications. Due to the portability of these multimedia terminal devices, the size of the display device is relatively small, and generally does not exceed the size of VGA (640x480). At the same time, most of these devices are embedded systems with relatively poor computing power and weak storage capacity due to the small storage space. On the other hand, it has now entered the era of high-definition video, and its resolution is mostly 720P (1280x720). In order to solve the above problems, the industry proposes two solutions. One is to directly...
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IPC IPC(8): H04N7/26H04N7/46H04N7/50H04N19/44
Inventor 罗小伟林江王森林福辉
Owner SPREADTRUM COMM (SHANGHAI) CO LTD