A multi-channel audio synchronous recording and broadcasting method and corresponding system
A technology of synchronous recording and audio synchronization, which is applied in the field of audio signal processing and digital signal processing, and can solve problems such as playback speed differences, speakers not in accordance with the same, discounts, etc.
Active Publication Date: 2017-01-11
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology
When recording, if different audio tracks do not start / stop recording audio signals at the same time, and when storing, they are not based on the same time base; when sending the recorded audio data to the speakers for playback, each speaker does not play according to the same time base If the input signal is not in sync at any time during the entire playback process, the sound reproduction effect will be greatly reduced due to the difference in playback time and playback speed between different tracks.
[0006] In addition, there are problems such as pause, program exchange, program jump, and volume adjustment during program recording and broadcasting. In order to ensure that these control operations are timely and effective, the synchronization processing delay of the controller should not be too long, otherwise there will be obvious control delays sense, which is not conducive to real-time control on site
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[0044] Below, the present invention will be described in detail in conjunction with the accompanying drawings and specific embodiments.
[0045] figure 1 The multi-channel audio synchronous recording and playing system of the present invention is illustrated. Where there are multiple audio sources to be recorded, use a suitable phased microphone array to record each audio source separately. The recording end in the system includes a multi-channel synchronous recording master controller and at least one multi-channel synchronous recording slave controller. In the case that a phased microphone array controlled by a slave controller can meet the recording requirements, only one slave controller for multi-channel synchronous recording can be set.
[0046] Fig. 1 shows the situation including N slave controllers. A phased microphone array composed of N*M microphones records N*M audio sources, and the generated audio data is sent to N multi-channel synchronous recording slave con...
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The invention discloses a synchronous multi-channel audio recording and playing method and system, in particular a multi-channel recording and playing scheme based on a DMS dynamic sound system. Each path of audio signals uses the same system reference clock in the recording and playing stages, and multi-channel audio data is synchronized through comparing the audio sampling data time information of the recording link and the playing link. When recording a multi-channel sound source, each audio track simultaneously starts / stops recording audio signals, each path of audio track storage is corresponding to the same time reference, and therefore, the multiple paths of audio data have the same time length, and the post processing is facilitated; when playing, each recorded audio data is sent to a loudspeaker, each loudspeaker plays the input signal according to the same time reference, and all the audio tracks are located in a synchronous state at any time in the whole playing process.
Description
technical field [0001] The present invention proposes a multi-channel audio data synchronous recording method, a corresponding broadcasting method and a corresponding system, especially a DMS-based multi-channel audio synchronous recording method, a broadcasting method and a corresponding system. Mainly involved in the field of audio signal processing and digital signal processing. Background technique [0002] The multi-channel sound field system has experienced the development process from monophonic to dual-channel to five-channel. At present, there are many technical specifications for various sound fields used by people. The most common surround sound formats are Dolby (Dolby), HTX, DTS, SACD and DVD Audio. Among them, SACD and DVDAudio are both high-resolution record formats. Movies do not use these two formats. The surround formats of movies mainly use DTS ES6.1 and Dolby Digital EX6.1. In terms of the number of decoding channels, Dolby ProLogic is 4 channels, Dolby...
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IPC IPC(8): H04S7/00H04S3/00G11B20/10
Inventor 马赛胥文彬张勤
Owner COMMUNICATION UNIVERSITY OF CHINA