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Magnetic recording/reproducing unit

A replay device and magnetic recording technology, applied in data recording, recording signal processing, recording information storage, etc., can solve the problem of inconsistency in playback time of video and audio data

Inactive Publication Date: 2001-10-24
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem of inconsistency in playback time of video and audio data

Method used

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  • Magnetic recording/reproducing unit
  • Magnetic recording/reproducing unit
  • Magnetic recording/reproducing unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] FIG. 1 is a block diagram showing an inverse shift portion of a magnetic recording and reproducing apparatus according to Embodiment 1 of the present invention. The video inverse shift section 1 in Fig. 1 is the same as the previous example. Fig. 2 is an explanatory diagram specifically explaining reverse shift in the magnetic recording and reproducing apparatus according to Embodiment 1 of the present invention.

[0018] In this embodiment, the audio data during one frame of video signal period is divided into 9 data segments D1, D2...D9, and the shift and inverse shift are performed with these segments as units.

[0019] Hereinafter, this embodiment will be described with reference to FIGS. 1 and 2 .

[0020] During recording, the segment columns (D1, D2, D3, D4, D5, D6, D7, D8, D9) of the audio data are shifted in the order (D7, D2, D6, D4, D1, D5, D8, D9, The segment column 20 of D3) is also recorded on the magnetic recording and reproducing device.

[0021] At t...

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PUM

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Abstract

A magnetic recording / reproducing unit for digital video and audio signals includes an address generator (3) that produces audio deshuffling addresses in reverse order during reverse playback; and an audio deshuffling circuit (2) that produces audio data in accordance with the output addresses from the address generator (3).

Description

technical field [0001] The present invention relates to a magnetic reproducing device for digitally encoding video and audio and recording or reproducing them. Background technique [0002] The video and audio digital recording and playback device digitizes the video signal and audio signal, then exchanges and arranges the time sequence of each quantitative data and records it on the magnetic recording medium. In this way, a method is adopted in which the exchange sequence performed during recording is restored to the original timing during playback. [0003] Such an exchange arrangement at the time of recording is called "shift", and an exchange arrangement at the time of playback is called "reverse shift". In this method, even when a part of the recorded and reproduced data is lost due to damage on the magnetic medium, the lost points can be dispersed without concentrating on one point, thereby reducing the time for sound discontinuity due to data loss. [0004] In the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/92G11B20/10H04N5/783H04N5/93
CPCG11B20/10527H04N5/783G11B2020/1062G11B20/10
Inventor 木下实
Owner PANASONIC CORP