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Reference frame selection method, video transcoding method, electronic device and storage medium

A video transcoding and reference frame technology, which is applied in selective content distribution, digital video signal modification, electrical components, etc., to achieve the effect of narrowing the traversal range, reducing evaluation, and reducing the amount of calculation

Active Publication Date: 2021-10-22
SHENZHEN ONETHING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a reference frame selection method, which can solve the problem of how to quickly and accurately select a reference frame to shorten the motion estimation time and improve the coding efficiency
[0012] The second object of the present invention is to provide a video transcoding method, which can solve the problem of how to quickly and accurately select a reference frame to shorten the motion estimation time and improve the coding efficiency

Method used

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  • Reference frame selection method, video transcoding method, electronic device and storage medium
  • Reference frame selection method, video transcoding method, electronic device and storage medium
  • Reference frame selection method, video transcoding method, electronic device and storage medium

Examples

Experimental program
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Embodiment 1

[0053] Such as figure 2 It is a schematic flow chart of the method for selecting a reference frame in this embodiment, which is applicable to such as image 3 The video transcoding module shown. The video transcoding module includes a first encoder and at least one second encoder for processing the same video stream and outputting them respectively. The first encoder and the second encoders compress and encode the same input video stream; the first encoder and the second encoder can use different code rate control parameters, so as to output video streams with different qualities, such as Output video stream 1-video stream 3.

[0054] Macroblocks are the main bearers of video information. A coded image is usually divided into multiple macroblocks, which contain the brightness and chrominance information of each pixel. In H.264, a macroblock is a 16×16 pixel area in an image frame, and is the basic operation unit of motion compensation. In H.265, the size of the macroblock...

Embodiment 2

[0073] Such as Figure 5 The shown reference frame selection method includes the following steps:

[0074] Step S210, the second encoder acquires frame type information from the first encoder.

[0075] When encoding the input video stream, the first encoder calculates a group of pictures (Group of Pictures, GOP) structure, which can reflect the type of each frame, that is, frame type information. The second encoder can multiplex the frame type information obtained from the first encoder, so that the second encoder does not need to analyze and calculate the frame type; The definitions are completely consistent to ensure the accuracy and stability of the second encoder using the reference frame information of the first encoder.

[0076] In another embodiment, the GOP structure can be calculated by the second encoder, and the reference frame information of the first encoder can also be used by the second encoder, but the stability is slightly worse and the calculation amount is...

Embodiment 3

[0092] The embodiment of the present invention provides a video transcoding method for such as image 3 The video transcoding module shown. The video transcoding module includes a first encoder and at least one second encoder for processing the same video stream and outputting them respectively.

[0093] The video transcoding method specifically adopts the reference frame selection method provided in Embodiment 1 and Embodiment 2 when the second encoder selects the reference frame.

[0094] Other steps of the video transcoding method can be implemented according to existing technologies, such as video coding standards such as H.264 / AVC and HEVC / H.265, and the embodiments of the present invention do not involve improvements to this part, so details are not repeated here.

[0095] As a preferred embodiment, such as Figure 6 As shown, the video transcoding module further includes a video decoder for converting the input video stream into data suitable for the first encoder and...

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Abstract

The invention discloses a reference frame selection method, a video transcoding method, an electronic device and a storage medium, which are used in a video transcoding module. The video transcoding module includes a first encoder and a second encoder, and the first encoder is used to process the first The macroblock, the second encoder is used to process the second macroblock; the reference frame selection method includes: obtaining the reference frame information of the target macroblock, the target macroblock is the first macroblock associated with the second macroblock, the reference frame of the target macroblock The frame information is calculated by the first encoder; the reference frame information of the second macroblock is calculated according to the reference frame information of the target macroblock. The second encoder can refer to the reference frame information of the first encoder, reduce the traversal range of the best reference frame, and reduce the evaluation of the reference frame by the second encoder, thereby reducing the calculation amount of video transcoding; and the first encoder, The second encoder can output videos with different bit rates.

Description

technical field [0001] The invention relates to video compression technology, in particular to a reference frame selection method, a video transcoding method, electronic equipment and a storage medium. Background technique [0002] Video coding standards such as H.264 / AVC, HEVC / H.265 provide excellent coding performance. H.264 / AVC compression technology mainly uses the following methods to compress video data. [0003] 1) Intra-frame prediction compression solves the problem of spatial data redundancy. [0004] 2) Inter-frame prediction compression, that is, motion estimation and compensation, solves the problem of temporal data redundancy. [0005] 3) Integer discrete cosine transform, namely DCT, changes spatial correlation into irrelevant data in frequency domain and then performs quantization. [0006] 4) CABAC compression. [0007] The implementation of video coding such as H.264 / AVC and HEVC / H.265 needs to find the best matching macroblock of the current macroblock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/4402H04N19/13H04N19/167H04N19/176H04N19/573
CPCH04N21/4402H04N19/13H04N19/167H04N19/176H04N19/573
Inventor 刘兴强
Owner SHENZHEN ONETHING TECH CO LTD