Double-speed video playing method and device

A double-speed playback and video technology, applied in the field of double-speed video playback, can solve the problems of missing video scenes, low video playback fluency, and large intervals

Active Publication Date: 2015-05-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned method of realizing double-speed playback by only decoding I frames selects an I frame in each GOP, and the length of the video frame sequence contained in the GOP is different, resulting in the interval between the selected I frames being also long or short It is not the same, and the selection of video frames in units of GOP makes the interval between I frames relatively large, which will cause a large number of missing video scenes to be played, which in turn will lead to relatively low fluency of video playback

Method used

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  • Double-speed video playing method and device

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Embodiment Construction

[0099] The following will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0100] The method for playing video at a double speed provided by the embodiment of the present invention can be applied to a PVR service system, figure 1 Shown is the structure diagram of the PVR business double-speed playback system. The set-top box generates code stream files and index files during PVR recording. The code stream files can be in Transport Stream (TS) format, and the data organization form is in units of TS packets. Each video frame data may contain multiple TS Bag. The index file records the information of each video frame in the TS file, including frame type, position in the file, size of each frame, time stamp of each frame and other information....

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Abstract

The invention discloses a double-speed video playing method and device. The double-speed video playing method comprises the following steps of at least dividing a video frame sequence which is formed by video frames in a to-be-played video into one video frame combination section according to the video playing doubled speed and the maximum decoding frame rate of a video decoder; respectively selecting at least one video frame to obtain a video frame set according to a fixed inter-frame interval in every divided video frame combination section; decoding video frames in the video frame set, outputting a decode according to the playing sequence or reverse playing sequence of the video frames in the to-be-played video and obtaining the video frame. The double-speed video playing method can retain most scenes of the to-be-played video frame sequence, avoids scene jump and blocked playing and improves the video playing smoothness.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for playing video at double speed. Background technique [0002] With the continuous development of multimedia technology, the service of Personal Video Recorder (PVR) based on Set Top Box (Set Top Box, STB) continues to mature. Users have higher and higher requirements for PVR functions, and have higher requirements for special effects playback of recorded videos. [0003] In the PVR service, a typical application scenario for performing special effects on a recorded video is fast-forwarding and rewinding the video at a double speed. Due to the limitation of the video decoding capability of the video decoder, the mode of only decoding I frames is generally adopted at present to realize double-speed playback of fast forward and fast rewind of the video. The process of realizing double-speed playback by only decoding the I frame is as follows: ...

Claims

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Application Information

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IPC IPC(8): H04N21/44H04N21/4402H04N21/2387
CPCH04N21/2387H04N21/440281H04N21/47217H04N21/8456
Inventor 刘冠志周忠
Owner HUAWEI TECH CO LTD
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