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Rewound video generating method and device and play device

A video and video frame technology, applied in the video field, can solve problems such as unclear pictures, unclear non-key frames, blur, etc.

Inactive Publication Date: 2016-08-24
LETV INFORMATION TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] For the implementation of video reverse playback, in the prior art, decoding is usually performed from the last frame of the video, and after decoding, it is encoded as the first frame of the new video, and so on. However, there are usually clear key frames and key frames in a video. Unclear non-key frames, if the video is decoded and encoded frame by frame, it may cause unclear or blurred pictures in the encoded new video

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  • Rewound video generating method and device and play device
  • Rewound video generating method and device and play device

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Embodiment Construction

[0015] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0016] The video rewinding in the present invention refers to playing a section of video in reverse chronological order, for example, a section of video of pedestrians walking forward normally is converted into a section of video of pedestrians walking backwards after the video is rewound. That is, when the inverted video is played, the last frame of the original video is played at the front of the new video, and the top frame of the original video is played at the end of the new video.

[0017] A coded video usually includes multiple key frames (I frames), and there are a certain number of non-key frames (B frames and P frames) between each two key frames. The ...

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Abstract

The invention discloses a rewound video generating method and device and a play device, and relates to the field of videos. The method comprises that frames of an original video are grouped according to key frames, and each frame and a non-key frame thereafter form one group; the video frame groups are decoded in inverted time sequence, the last group is decoded at first, and the first group is decoded at last; and video images of all the decoded frames are recoded, the last group of the original video is coded as the first group of a new video, the last but one group of the original video is coded as the second group of the new video, and the rest can be done in the same manner. The new video generated finally is a rewound video relative to the original video. The sequence of frame videos in each video frame group is kept unchanged. Thus, the generated rewound video is complete in frames, clear and coherent, and the realization method is rapid.

Description

technical field [0001] The present invention relates to the video field, in particular to a method, device and playback device for generating reverse video. Background technique [0002] For the implementation of video reverse playback, in the prior art, decoding is usually performed from the last frame of the video, and after decoding, it is encoded as the first frame of the new video, and so on. However, there are usually clear key frames and key frames in a video. Unclear non-key frames, if the video is decoded and encoded frame by frame, it may cause the problem of unclear or blurred pictures in the encoded new video. Contents of the invention [0003] The object of the present invention is to provide a method, device and playback device for generating reverse video, which can make the reverse video clear and coherent. [0004] In order to achieve the above object, the present invention provides a method for generating reverse video, the method comprising: grouping th...

Claims

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Application Information

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IPC IPC(8): H04N21/8547H04N21/234H04N21/44
CPCH04N21/8547H04N21/234H04N21/44
Inventor 李先彪
Owner LETV INFORMATION TECH BEIJING
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