Optical disk apparatus for recording and reproducing compression encoded video signal
First Claim
1. An optical disk having recorded thereon bandwidth compressed data containing both infield or inframe encoded data which have been produced by infield or inframe encoding of a video signal and interfield or interframe encoded data which have been produced by interfield or interframe encoding of the video signal, the improvement comprising a specific recording area which is located at an innermost or outermost end of the optical disk and which has recorded therein position information indicating positions of only the infield or inframe encoded data.
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Accused Products
Abstract
During optical disk recording of a digital coded video signal, the numbers of infield or inframe encoded data frames or their address information are stored in an innermost or outermost region of an optical disk, and during playback, they are first retrieved for use as control data. Since the numbers or address information of the infield or inframe encoded data frames are acquired, a specific playback mode, e.g. high-speed playback or still picture reproduction, can readily be executed with advantageous effects through searching the address information.
26 Citations
4 Claims
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1. An optical disk having recorded thereon bandwidth compressed data containing both infield or inframe encoded data which have been produced by infield or inframe encoding of a video signal and interfield or interframe encoded data which have been produced by interfield or interframe encoding of the video signal, the improvement comprising a specific recording area which is located at an innermost or outermost end of the optical disk and which has recorded therein position information indicating positions of only the infield or inframe encoded data.
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2. An optical disk apparatus for recording bandwidth compressed video data produced by infield or inframe encoding and interfield or interframe encoding a video signal onto an optical disk which has a data recording area including a specific recording area located at an innermost or outermost end of the optical disk, said apparatus comprising:
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recording signal processing means for subjecting some frames of an input video signal to an infield or inframe encoding and the remaining frames of the input video signal to an interfield or interframe encoding to obtain bandwidth compressed recording data containing both infield or inframe encoded data and interfield or interframe encoded data; memory means for storing therein position information indicating positions of only the infield or inframe encoded data in the bandwidth compressed recording data; optical head means for writing a signal fed thereto onto the data recording area of the optical disk; optical head driving means for driving the optical head means to move to a position in the data recording area; control means for controlling the recording signal processing means and the optical head driving means so as to feed the bandwidth compressed recording data to the optical head means and move the optical head means to a position in the data recording area except for the specific recording area so that the bandwidth compressed recording data are recorded in the data recording area except for the specific recording area, and so as to feed at a specific timing the position information stored in the memory means to the optical head means and move the optical head means to a position in the specific recording area so that the position information is recorded in the specific recording area.
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3. An optical disk apparatus for reproducing a video signal which has been recorded in a data recording area on an optical disk as bandwidth compressed video data containing both infield or inframe encoded data produced by infield or inframe encoding some frames of an original video signal and interfield or interframe encoded data produced by interfield or interframe encoding the remaining frames of the original video signal, the data recording area including at an innermost or outermost end the optical disk a specific recording area having recorded therein position information indicating positions of only the infield or inframe encoded data in the bandwidth compressed video data, said apparatus comprising:
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optical head means for retrieving data recorded on the optical disk; optical head driving means for driving the optical head means to move to a desired position in the data recording area of the optical disk, said optical head driving means first driving the optical head means to move to the specific recording area to retrieve therefrom the position information; memory means for storing therein the retrieved position information; control means for calculating an access position to be accessed for retrieving the bandwidth compressed video data from the position information stored in the memory means, and for controlling the optical head driving means according to the calculated access position to move the optical head means to the access position to thereby retrieve the bandwidth compressed video data; and reproduced signal processing means for decoding the retrieved bandwidth compressed video data to obtain a reproduced video signal. - View Dependent Claims (4)
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Specification