Optical disk and optical recording and reproducing apparatus
First Claim
1. An optical recording apparatus for recording video signals and audio signals on an optical disk having opposite sides at least one of which is divided in a radial direction into an inner area closer to a center of the disk and an outer area closer to an outer circumference of the disk, each of the inner and outer areas having formed therein spiral or concentric tracks each having at least one sector which has an address area having recorded therein address information identifying the sector, an audio signal recording area for recording therein an audio signal and a video signal recording area for recording therein a video signal, said apparatus comprising:
- disk drive means for rotating the optical disk at a constant angular velocity;
a first optical head for accessing a sector in the inner area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector;
a second optical head for accessing a sector in the outer area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector;
audio signal encoding means for encoding a specific unit of an input audio signal to obtain a coded audio data;
video signal encoding means for encoding a specific unit of an input video signal to obtain a coded video data;
data distributing means for distributing each of the coded audio data and the coded video data to a first group of video data and audio data and a second group of audio data and video data at a specific distribution ratio;
a first modulating and recording means for modulating the first group of audio data and video data to obtain a first group of modulated audio data and modulated video data, and for applying the first group of modulated audio data and modulated video data to the first optical head to record the modulated audio data and the modulated video data in the first group into the audio signal recording area and the video signal recording area, respectively in a sector in the inner area of the optical disk; and
a second modulating and recording means for modulating the second group of audio data and video data to obtain a second group of modulated audio data and modulated video data, and for applying the second group of modulated audio data and modulated video data to the second optical head to record the modulated audio data and the modulated video data in the second group into the audio signal recording area and the video signal recording area, respectively in a sector in the outer area of the optical disk.
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Accused Products
Abstract
An optical disk is divided in a radial direction into an inner area and an outer area each having formed therein spiral or concentric tracks each having a sector which has an address area, an audio signal recording area and a video signal recording area. A specific unit of audio signal and a specific unit of video signal are divided into a plurality of audio blocks and a plurality of video blocks, respectively. Each of the audio blocks and the video blocks are separated into a first group and a second group. The audio blocks and video blocks in the first group are respectively recorded into the audio signal recording area and the video signal recording area in a sector in the inner area, and the audio blocks and video blocks in the second group are respectively recorded into the audio signal recording area and the video signal recording area in a sector in the outer area.
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Citations
8 Claims
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1. An optical recording apparatus for recording video signals and audio signals on an optical disk having opposite sides at least one of which is divided in a radial direction into an inner area closer to a center of the disk and an outer area closer to an outer circumference of the disk, each of the inner and outer areas having formed therein spiral or concentric tracks each having at least one sector which has an address area having recorded therein address information identifying the sector, an audio signal recording area for recording therein an audio signal and a video signal recording area for recording therein a video signal, said apparatus comprising:
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disk drive means for rotating the optical disk at a constant angular velocity; a first optical head for accessing a sector in the inner area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector; a second optical head for accessing a sector in the outer area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector; audio signal encoding means for encoding a specific unit of an input audio signal to obtain a coded audio data; video signal encoding means for encoding a specific unit of an input video signal to obtain a coded video data; data distributing means for distributing each of the coded audio data and the coded video data to a first group of video data and audio data and a second group of audio data and video data at a specific distribution ratio; a first modulating and recording means for modulating the first group of audio data and video data to obtain a first group of modulated audio data and modulated video data, and for applying the first group of modulated audio data and modulated video data to the first optical head to record the modulated audio data and the modulated video data in the first group into the audio signal recording area and the video signal recording area, respectively in a sector in the inner area of the optical disk; and a second modulating and recording means for modulating the second group of audio data and video data to obtain a second group of modulated audio data and modulated video data, and for applying the second group of modulated audio data and modulated video data to the second optical head to record the modulated audio data and the modulated video data in the second group into the audio signal recording area and the video signal recording area, respectively in a sector in the outer area of the optical disk. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An optical reproducing apparatus for reproducing video signals and audio signals recorded on an optical disk, said optical disk having opposite sides at least one of which is divided in a radial direction into an inner area closer to a center of the disk and an outer area closer to an outer circumference of the disk, each of the inner and outer areas having formed therein spiral or concentric tracks each being divided into sectors at specific angular intervals, each of the sectors having an address area having recorded therein address information identifying the sector, an audio signal recording area having recorded therein a first group of modulated coded audio data and a video signal recording area having recorded therein a first group of modulated coded video data, said apparatus comprising:
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disk drive means for rotating the optical disk at a constant angular velocity; a first optical head for accessing a sector in the inner area of the optical disk with a converged light to reproduce from the accessed sector the first group of modulated coded audio data and the first group of modulated coded video data; a second optical head for accessing a sector in the outer area of the optical disk with a converged light to reproduce from the accessed sector the second group of modulated coded audio data and the second group of modulated coded video data; a first demodulating means for demodulating the first group of modulated coded audio data and the first group of modulated coded video data reproduced by the first optical head to obtain a first group of coded audio data and a first group of coded video data; a second demodulating means for demodulating the second group of modulated coded audio data and the second group of modulated coded video data reproduced by the second optical head to obtain a second group of coded audio data and a second group of coded video data; data combining means for combining the first group of coded audio data and the second group of coded audio data to obtain a combined coded audio data and for combining the first group of coded video data and the second group of coded video data to obtain a combined coded audio data; audio decoding means for decoding the combined coded audio data to obtain a reproduced audio signal; and video decoding means for decoding the combined coded video data to obtain a reproduced video signal.
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8. An optical recording and reproducing apparatus for recording video signals and audio signals on an optical disk and for reproducing the recorded signals from the optical disk, said optical disk having opposite sides at least one of which is divided in a radial direction into an inner area closer to a center of the disk and an outer area closer to an outer circumference of the disk, each of the inner and outer areas having formed therein spiral or concentric tracks each being divided into sectors at specific angular intervals, each of the sectors having an address area having recorded therein address information identifying the sector, an audio signal recording area for recording therein an audio signal and a video signal recording area for recording therein a video signal, said apparatus comprising:
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disk drive means for rotating the optical disk at a constant angular velocity; a first optical head for accessing a sector in the inner area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector and to reproduce a signal from the accessed sector; a second optical head for accessing a sector in the outer area of the optical disk with a converged light to record a signal applied thereto onto the accessed sector and to reproduce a signal from the accessed sector; address information detecting means for detecting from signals reproduced by the first and second optical heads address information of the sectors accessed by the first and second optical heads; optical head control means for moving the first and second optical heads to respective desired sectors based on the address information detected by the address information detecting means; audio signal encoding means for encoding a specific unit of an input audio signal to obtain coded audio data; video signal encoding means for encoding a specific unit of an input video signal to obtain coded video data; data distributing means for distributing each of the coded audio data and the coded video data to a first group of video data and audio data and a second group of audio data and video data at a specific distribution ratio; a first modulating and recording means for modulating the first group of audio data and video data to obtain a first group of modulated audio data and modulated video data, and for applying the first group of modulated audio data and modulated video data to the first optical head to record the modulated audio data and the modulated video data in the first group into the audio signal recording area and the video signal recording area respectively in a sector in the inner area of the optical disk; and a second modulating and recording means for modulating the second group of audio data and video data to obtain a second group of modulated audio data and modulated video data, and for applying the second group of modulated audio data and modulated video data to the second optical head to record the modulated audio data and the modulated video data in the second group into the audio signal recording area and the video signal recording area, respectively in a sector in the outer area of the optical disk; a first demodulating means for demodulating the modulated audio data and modulated video data in the first group reproduced by the first optical head to obtain a first group of coded audio data and coded video data; a second demodulating means for demodulating the modulated audio data and modulated video data in the second group reproduced by the second optical head to obtain a second group of coded audio data and coded video data; data combining means for combining the first group of coded audio data and the second group of coded audio data to obtain a combined coded audio data and for combining the first group of coded video data and the second group of coded video data to obtain a combined coded audio data; audio decoding means for decoding the combined coded audio data to obtain a reproduced audio signal; and video decoding means for decoding the combined coded video data to obtain a reproduced video signal.
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Specification