Video recording method and apparatus thereof

A video recording and video technology, applied in color TV parts, TV system parts, digital video signal modification, etc., can solve problems such as increased computational complexity, low compression rate of intra-frame images, and reduced quality of recorded images , to achieve the effect of ensuring the quality of video recording, increasing the amount of computation, and avoiding dependence

Active Publication Date: 2013-06-05
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the above-mentioned video recording, when using the method of regularly inserting some intra-frame encoded images at the encoding end to realize the recording of video content from any moment, due to the low compression rate of the intra-frame images and changing the encoding Therefore, the video recording process will affect the actual video effect; when using the method of adding a camera at the image output end to realize the recording of video content from any moment, the peripheral equipment is added, and Due to the need to re-encode the reconstructed image, the computational complexity is greatly increased, and the quality of the recorded image is greatly reduced due to the compression of the encoding process.

Method used

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  • Video recording method and apparatus thereof

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Experimental program
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Embodiment 1

[0026] Embodiments of the present invention provide a method for video recording, such as figure 1 As shown, the method includes:

[0027] 101. When the current video needs to be recorded, at the encoding end or the decoding end, according to the encoding method of the video code stream, obtain the reconstructed image of the video frame corresponding to the selected time, where the selected time is the moment when the recording of the current video code stream starts. The selected moment may be any moment when the user needs to start recording the current image, which is not limited in this embodiment of the present invention.

[0028] Wherein, the acquiring the reconstructed image of the video frame corresponding to the selected moment according to the encoding method of the video code stream includes: when the encoding method of the video code stream is a single reference frame encoding method, obtaining a frame from the selected moment Frame reconstructed images; when the ...

Embodiment 2

[0035] An embodiment of the present invention provides a video recording method, wherein the video recording method can be implemented at the video encoding end, and can also be implemented at the video decoding end. The embodiment of the present invention takes video recording at the video decoding end as an example to describe in detail methods of video recording, such as figure 2 As shown, the method includes:

[0036] 201. The decoding end receives a video code stream, decodes the video code stream to form a reconstructed image, and plays and displays the reconstructed image.

[0037] 202. The decoder detects whether the current video needs to be recorded while decoding, playing and displaying the video code stream. When it detects that the current video needs to be recorded, perform step 203; when it detects that the current video does not need to be recorded, The current video will not be recorded.

[0038] 203. Determine whether to record one or more frames of recons...

Embodiment 3

[0050] The embodiment of the present invention provides a method for video recording. Taking video recording at the video encoding end as an example, the method for video recording is described in detail, as follows: image 3 As shown, the method includes:

[0051] 301. The encoding end sends the encoded video code stream to the video code stream receiving end, so that the receiving end decodes, plays and displays the video code stream after receiving the video code stream.

[0052] 302. While the encoding end is sending the encoded video code stream, detect whether the current video needs to be recorded, and when it is detected that the current video needs to be recorded, perform step 303; when it is detected that the current video does not need to be recorded, do not Record the current video.

[0053] 303. The encoder judges whether to record one or more frames of reconstructed images starting at the selected time, and if it determines to record one or more frames of recons...

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Abstract

Embodiments of the invention, which relate to the video recording field, disclose a video recording method and an apparatus thereof. Under the condition of guaranteeing video recording qualities, recording video contents at any time without increasing computation and peripherals can be realized. The method of the embodiments in the invention comprises the following steps: acquiring a reconstructed image of a video frame which is corresponding to a selected moment according to a coding mode of a video stream on a coding terminal or a decoding terminal when a current video is needed to be recorded, wherein the selected moment is the moment of recording the current video stream; performing a lossless compression coding to the reconstructed image so as to obtain the lossless-compression-codedvideo stream and then storing the lossless-compression-coded video stream into a recording memory; directly storing the video stream which is corresponding to a subsequent image of the reconstructed image into the recording memory. The embodiments of the invention can be mainly used during a video recording process, especially an on-line video recording process.

Description

technical field [0001] The invention relates to the field of video recording and broadcasting, in particular to a video recording method and device. Background technique [0002] In the current mainstream video compression coding standards, in order to improve the compression rate, the coding method of inter-frame prediction is adopted, that is, the following image frame uses the previous image frame as the prediction frame, and then the predicted residual value is encoded. Such pictures are called inter pictures. In the actual encoding process, there are also some images that do not refer to other frame images, but are only predictively encoded within the frame, such as the encoded image of the first frame, and such images are called intra-frame images. It is also possible to randomly insert some intra-pictures during encoding as needed. Due to the dependence of inter pictures on previous predicted pictures, all predicted pictures must be decoded before decoding inter pic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N5/76H04N19/42H04N19/503
Inventor 李军华王浦林
Owner HUAWEI DEVICE CO LTD
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