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Method and device for achieving audio/video seamless switching in real-time digital television time shifting playing

A technology of digital TV and time-shifted playback, which is applied in electrical components, image communication, selective content distribution, etc. It can solve the problems of audio and video gaps, unsmooth pictures and sounds, etc., and achieve reduced hardware costs, continuous picture and sound and Smooth, avoid repeated playback effect

Inactive Publication Date: 2013-06-05
SAMSUNG ELECTRONICS CHINA R&D CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, when the above-mentioned prior art realizes time-shifted playback of real-time digital TV, the picture and sound are obviously not smooth, that is, when switching from a still picture to playing PVR, audio and video switching will produce audio and video gaps

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  • Method and device for achieving audio/video seamless switching in real-time digital television time shifting playing
  • Method and device for achieving audio/video seamless switching in real-time digital television time shifting playing
  • Method and device for achieving audio/video seamless switching in real-time digital television time shifting playing

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0037]A GOP (Group of Pictures, Group of Pictures) is a group of continuous pictures. MPEG coding technology divides pictures (ie frames) into three types: I frame, P frame and B frame. Among them: I is an intra-coded frame, P is a forward prediction frame, and B is a bidirectional interpolation frame. Simply put, I frame is a complete picture, which is the first frame of each GOP. I frame can also be called a key frame, while P frame and B frame record changes relative to I frame, and P frame is composed of Prediction is done on the P-frame or I-frame preceding it. Without I-frames, P-frames and B-frames cannot be decoded.

[0038] When the user presses the pause button, it is very likely that the user is in a certain GOP, that is to say, the first ...

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Abstract

The invention provides a method and a device for achieving audio / video seamless switching in real-time digital television time shifting playing. Video data in received transport streams after a digital television receives a pause command is analyzed, the first keyframe after the pause command is searched in the video data, the transport stream before the first keyframe after the pause command is received is stored in a data buffer, and the first keyframe and the transport streams after the first keyframe are stored in an external storage. When the digital television receives a playing command in a pause state, firstly the transport stream stored in the data buffer is decoded, and then demultiplexing and decoding are carried out on the first keyframe and the transport streams after the first keyframe stored in the external storage. By means of the method and the device, audio / video seamless switching in real-time digital television time shifting playing can be achieved.

Description

technical field [0001] The invention relates to digital television technology, in particular to a method and device for realizing seamless switching of audio and video in real-time digital television time-shifting playback. Background technique [0002] In the following three cases, switching will occur between real-time digital TV programs (Live DTV) and personal video recording (PVR, Personal Video Recorder, also known as Recorded TV). The effect of time-shifted playback of TV programs. [0003] The first type of time-shifted playback: Time-shifted when watching real-time digital TV programs [0004] The existing technical solution for realizing the first time-shifted playback: when the digital TV is playing a real-time digital TV program, the user presses the pause button, so that the picture being displayed on the screen at this moment is still on the TV screen, and thereafter the The transport stream (TS) of TV program data is stored in the memory, and when the user p...

Claims

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Application Information

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IPC IPC(8): H04N21/4405H04N21/434
Inventor 俞贵涛陈斌德季兵
Owner SAMSUNG ELECTRONICS CHINA R&D CENT
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