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Recording and reproducing apparatus

A technology of reproduction equipment and memory, which is applied in the directions of digital recording/reproduction, TV, color TV components, etc., and can solve the problem of video data being recorded in a lack of order.

Inactive Publication Date: 2004-09-22
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] Also, in some cases, depending on the type of input information source, there is a possibility that externally input video data may be recorded out of order

Method used

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  • Recording and reproducing apparatus
  • Recording and reproducing apparatus
  • Recording and reproducing apparatus

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Embodiment Construction

[0045] An embodiment of the present invention is described below.

[0046] First, shuffling of video data will be described.

[0047] In order to compress and record video data, an orthogonal transformation is performed. For this purpose, shuffling (reorganization of video data) is performed in order to reduce changes in the amount of information and improve compression efficiency.

[0048] In order to simply perform the above-mentioned shuffling process, a method (banking method) can be used in which, using two memories each capable of storing one frame of video data provided, the data is written to one of them, and at the same time The previous frame data is read from the other in an order different from the order when the data was written.

[0049] However, conventional memory devices are expensive in price, and the two-frame memory required for the above-mentioned bank method is too large in capacity, and this method shows poor price-performance ratio. To solve this pro...

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Abstract

If there is always a difference in length between a reference signal and a vertical synchronizing signal, write and read in and from a shuffling memory are asynchronous, and this causes overwrite or mixing of data. Therefore, a memory for three frames is used as the shuffling memory to perform a shuffling processing without mixing the data.

Description

technical field [0001] The present invention relates to digital signal equipment for recording and reproducing digital video signals, and to equipment for recording externally input video signals. Background technique [0002] With the recent development of digital signal processing technology, devices for recording and reproducing highly efficient encoded digital data or the like of video signals such as digital video cassette recorders (hereinafter referred to as DVCs) have become common. [0003] A method of recording an externally input video signal such as a composite signal with such a recording and reproducing apparatus has been proposed in Unexamined Japanese Patent Application Hei 7-177469. [0004] Figure 8 Indicates a case of the above proposed scheme. Figure 8 Among them, 101 denotes an I / O block, 102 denotes a VSP block, 103 denotes a DRP block, 104 denotes a control block, 105 denotes an input video signal processing circuit, 106 denotes a shuffling memory (s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/92G11B20/10H04N5/93H04N9/804H04N9/888
CPCH04N9/888H04N9/8047G11B20/10
Inventor 斋藤修治加藤高明高仓英一
Owner SHARP KK