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Transcription repairing method of video tape audio signal

An audio signal and repair method technology, which is applied in recording signal processing, recording information storage, re-recording and other directions, can solve problems such as distortion and lack of audio signals, achieve good fit performance, improve mechanical and physical indicators, and repair audio information. Effect

Inactive Publication Date: 2017-10-24
SHANGHAI CONSERVATORY OF MUSIC +1
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  • Claims
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Problems solved by technology

[0005] The problem solved by the present invention is that the audio signal is missing and distorted in the existing U-Matic video tape audio signal transcription process

Method used

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  • Transcription repairing method of video tape audio signal
  • Transcription repairing method of video tape audio signal
  • Transcription repairing method of video tape audio signal

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Embodiment Construction

[0043] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] Such as figure 2 What is shown is a schematic flowchart of a method for transcribing and repairing an audio signal of a video tape according to an embodiment of the present invention. refer to figure 2 , the transcription repairing method of described videotape audio signal comprises the steps:

[0045] Step S1: processing the video tape by using tape surface coating repair technology;

[0046] Step S2: Transcribing the processed videotape audio signal twice to obtain an audio master file and an audio auxiliary file, wherein the contents of the audio master file and the audio auxiliary file are the same;

[0047] Step S3: determining a reference point for matching the audio main file and the audio auxiliary file, and adjust...

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Abstract

The invention provides a transcription repairing method of a video tape audio signal. The method comprises the following steps: using a magnetic tape surface coating repairing technology to process a video tape; transcribing the processed magnetic tape audio signal twice, to obtain an audio main file and an audio auxiliary file, the contents of the audio main file and the audio auxiliary file being the same; determining reference points for matching the audio main file and the audio auxiliary file, and according to the reference points, adjusting the audio main file or the audio auxiliary file; performing framing processing on the adjusted audio main file, to obtain a plurality of audio frames, and for each audio frame, searching a matched segment in the adjusted audio auxiliary file; based on a search result, determining audio frames missed in the audio main file, and using the corresponding matched segment in the audio auxiliary file to replace the missed audio frame, and splicing the audio frames, to repair the audio main file. The technical scheme solves problems of audio signal missing and distortion in an audio signal transcription process of an existing U-Matic video tape.

Description

technical field [0001] The invention relates to the field of video tape audio signal processing, in particular to a method for transcribing and repairing video tape audio signals. Background technique [0002] U-Matic is an analog video format launched by Sony Corporation of Japan. Its supporting U-type machine is easy to operate, excellent in performance, relatively good in image quality, and has electronic editing functions. It has been widely used in various fields such as education, and has become the main model of professional-level video recorders. Almost all U-Matic video tapes used by Chinese TV stations in the 1980s. Many radio stations, archives maintain a large amount of U-Matic videocassette material, which urgently needs to be digitized for long-term preservation. [0003] The main components of the magnetic tape of the U-Matic video tape are Co-γ-Fe2O3 magnetic powder (accounting for 70%) and adhesive for fixing the magnetic powder—polyester polyurethane (acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/86G11B20/10G11B27/19
CPCG11B5/86G11B20/10527G11B27/19G11B2020/10546
Inventor 许舒亚史寅袁征王劲松孙宁
Owner SHANGHAI CONSERVATORY OF MUSIC
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