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Image reproducing device and image data reverse reproducing method

A technology of image data and reproduction device, applied in image communication, data recording, character and pattern recognition, etc., can solve the problem of slow reproduction speed and achieve the effect of smooth generation

Inactive Publication Date: 2005-03-09
ALPINE ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at 1 / 2x speed, the playback speed is so slow that the same image is displayed repeatedly for every other 4 frames.

Method used

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  • Image reproducing device and image data reverse reproducing method
  • Image reproducing device and image data reverse reproducing method
  • Image reproducing device and image data reverse reproducing method

Examples

Experimental program
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Embodiment

[0033] FIG. 1 is a block diagram showing the main configuration of a DVD player according to a first embodiment of the present invention. The DVD player 1 includes a disc reading unit 20 for reading image data recorded in the DVD 10, a track buffer (track buffer) 30 for storing digital image data output by the optical disc reading unit 20, and an image output by the decoding track buffer 30. MPEG decoder 40 for data, and control unit 50 for controlling these units.

[0034] As is well known, the optical disc reading unit 20 is composed of a reading unit that optically reads data recorded on the DVD 10 and converts it into an electrical signal, an A / D conversion unit that amplifies the electrical signal and converts it into digital data, and the like. . The optical disc reading unit 20 searches for data recorded on a predetermined track position of the DVD 10 according to an instruction issued by the control unit 50 , and outputs the read data to the track buffer 30 .

[0035...

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Abstract

A digital versatile disk (DVD) player according to the present invention includes a disk read unit for reading image data (pictures) from a DVD, a track buffer for storing the read image data, an MPEG decoder for decoding the image data, and a control unit for controlling at least the track buffer when the image data is played back reversely. The control unit causes the track buffer to store a GOP or a VOBU to be reversely played back and to output the image data to the MPEG decoder while the image data is maintained in the track buffer.

Description

technical field [0001] The present invention relates to an image reproducing device for reproducing digital image data and a reproducing method for reversely reproducing image data compressed by the image reproducing device. Background technique [0002] One of methods for compressing image data such as still images and moving pictures is the MPEG (Motion Picture Expert Group) method. The image data compressed by the MPEG method is stored in storage media such as DVD, semiconductor memory, or hard disk, and the image data read from them is decoded and displayed on the monitor. [0003] There are three types of images compressed by the MPEG method: I images, P images, and B images. The I picture is an image compressed within a frame by performing DCT (Discrete Fourier Transform) and entropy compression, and has no relation to previous and subsequent images. The P picture is a picture obtained by compressing the difference from the preceding I picture or P picture for motion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/76G06K9/36G06K9/46G11B20/10G11B27/00H04N5/783H04N5/84H04N5/85H04N5/937H04N9/804
CPCH04N5/85G11B27/005H04N5/783G11B2220/2562H04N9/8042
Inventor 木村胜
Owner ALPINE ELECTRONICS INC
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