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Synchronous replay system for multi-channel audio and video and method thereof

A multi-channel audio and video synchronous playback technology, applied to TV system components, carrier index/addressing/timing/synchronization, TV, etc., can solve the problem of not designing multi-channel audio and video playback

Inactive Publication Date: 2012-06-27
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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AI Technical Summary

Problems solved by technology

[0008] The current player and Filter (filter) are all designed for single-channel video and audio playback, and there is no design for multi-channel audio and video playback

Method used

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  • Synchronous replay system for multi-channel audio and video and method thereof
  • Synchronous replay system for multi-channel audio and video and method thereof
  • Synchronous replay system for multi-channel audio and video and method thereof

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Embodiment Construction

[0027] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0028] At the application layer, the user can simultaneously open the video / audio files recorded by several airborne digital video recorders (DVR) through the playback software for playback. Because the DVR will mark each data frame (Sample) with a play time mark (PTS) when recording these channels of video / audio, so the playback software will read and play asynchronously according to the time mark of the data itself during playback. Therefore, the synchronization error of these channels of video during playback is controlled within the range that can be recognized by human eyes.

[0029] Such as figure 1 As shown, the multi-channel audio and video synchronous playback system of the present invention includes an application program module, a multi-channel file separator filter (Splitter Filter), a file read...

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Abstract

The invention discloses a synchronous replay system for multi-channel audio and video and a method of the synchronous replay system. The synchronous replay system for multi-channel audio and video comprises an application program module, a file reading filter, a multi-channel file separating filter, a decoder, a representation filter, and a display card or a sound card, wherein the application program module is used for transmitting instructions and receiving events; the file reading filter is mainly used for interacting with an external media source and reading data from source files; the multi-channel file separator filter is used for requesting data frames away a certain distance from a time sign from the source files of each channel according to the time sign to be played; the decoder is used for further processing the data transmitted from the multi-channel file separator filter and converting the processed data into video frame images acceptable by the file reading filter; the representation filter is used for rendering the final data to the display card or the sound card; and the display card or the sound card is used for playing the final data. According to the invention, multi-channel video and audio data can be played in a user-defined format, and the synchronization error is controlled within in a visible range of human eyes.

Description

technical field [0001] The invention relates to a multi-channel audio and video synchronous playback technology, in particular to a multi-channel audio and video synchronous playback system and method thereof. Background technique [0002] The multi-channel video playback software is developed based on DirectShow. DirectShow is a development kit provided by Microsoft for multimedia processing on the Windows platform. It is currently the most widely used and most flexible multimedia framework on Windows. Provides a complete set of solutions. [0003] DirectShow provides an open development environment, which is based on Filter (filter) modules to form a Filter Graph for multimedia processing specific needs. Developers can flexibly customize and replace their own or third-party Filters according to their own needs. Filters in DirectShow are mainly divided into the following three categories: [0004] 1. Source Filter (source filter): mainly responsible for interacting with e...

Claims

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Application Information

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IPC IPC(8): G11B19/02G11B27/10H04N5/93H04N5/92
Inventor 姜文毅肖忠炳巩来源张继豪
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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