Interface circuit and optical disk manufacturing system that uses same

• US 6,343,028 B1
• Filed: 09/02/1999
• Issued: 01/29/2002
• Est. Priority Date: 09/24/1998
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Kuwaoka, Toshiharu
• Primary Examiner(s): HINDI, NABIL Z
• Application Number:
  US09/388,759
• Time in Patent Office: 880 Days
• Field of Search: 369/47.28, 369/47.26, 369/47.35, 369/47.25, 369/47.48, 369/59.21
• US Class Current: 369/47.26
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/22 for reducing distortions
• CPC Class Codes: G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers

Abstract

An interface circuit that is suitable for use in a recording system and a system for manufacturing optical disks, which is provided with this interface circuit, have an analog-side interface circuit 100A and a digital-side interface circuit 100B, these interface circuits being optically linked, either acoustically, or electromagnetically, so as to enable mutual transmitting and receiving of a digital signal therebetween. The interface circuits 100A and 100B, which serve as a receiving side with respect to the other sides, detect the logic of the digital signal with a timing that does not include the jitter component that is included in the transmitted digital signal, the detected digital signal logic being used as the basis for generating a new digital signal.

Claims

1. A master recording medium manufacturing apparatus, comprising:

digital information converting means for converting information to be recorded to digital information; and

interface means, the interface means including;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting the synchronization information;

first light-receiving means for receiving optically transmitted, synchronization information from the first light-transmitting means;

synchronization controlling means for outputting digital information from the digital information converting means in synchronization with the synchronization information that is optically received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitted from the second light-transmitting means;

code detecting means, based on the synchronization information from the synchronization information generating means, for detecting a code of the digital information that is optically received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping means, based on the synchronization information from the synchronization information generating means, reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization control means and then outputs the resulting shaped waveform; and

master recording means for recording digital information that has been waveshaped by the interface means onto a recording medium that serves as the original recording medium for the manufacture of an optical disk.

2. A master recording medium manufacturing apparatus, comprising:

digital information converting means for converting information to be recorded to digital information; and

interface means, the interface means including;

synchronization information extracting means for extracting synchronization information from digital information from the digital information converting means;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting synchronization information that is generated by the synchronization information generating means or synchronization information that is extracted by the synchronization information extracting means;

first light-receiving means for optically receiving synchronization information that is optically transmitted from the first light-transmitting means;

synchronization controlling means for outputting digital information from the digital information converting means in synchronization with the synchronization information that is received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitted from the second light-transmitting means;

code detecting means, based on synchronization information from the synchronization information generating means or the synchronization extracted by the synchronization information extracting means, for detecting a code of digital information that is received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping means, based on the synchronization information from the synchronization information generating means, or based on synchronization information that is extracted by the synchronization information extracting means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization control means and then outputting the resulting shaped waveform; and

a master recording means for recording digital information that has been waveshaped by the interface means onto a master recording medium that serves as the original recording medium for the manufacture of an optical disk.

3. An optical disk manufacturing apparatus, comprising:

a master playback means for playing back digital information that has been recorded on a master recording medium for the purpose of recording onto an optical disk; and

interface means, the interface means including;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting the synchronization information;

first light-receiving means for optically receiving the optically transmitted synchronization information from the first light-transmitting means;

synchronization controlling means for outputting digital information from the master playback means, in synchronization with the synchronization information that is optically received at the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitting from the second light-transmitting means;

code detecting means, based on the synchronization information from the synchronization information generating means, for detecting a code of the digital information that is received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping mean, based on the synchronization information from the synchronization information generating means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization control means, and then outputting the resulting shaped waveform; and

optical disk manufacturing means for manufacturing an optical disk, based on digital information that is waveshaped by the interface means.

4. An optical disk manufacturing apparatus comprising:

master playback means for playing back digital information that has been recorded on a master recording medium for the purpose of recording onto an optical disk; and

interface means, the interface means including;

synchronization information extracting means for extracting synchronization information from digital information from the master playback means;

synchronization information generating means for generating synchronization information having a prescribed period;

A first light-transmitting means for optically transmitting synchronization information that is generated by the synchronization information generating means or synchronization information that is extracted by the synchronization information extracting means;

first light-receiving means for optically receiving digital synchronization information that is optically transmitted from the first light-transmitting means;

synchronization controlling means for outputting digital information from the master playback means, in synchronization with synchronization information that is optically received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitted from the second light-transmitting means;

code detecting means, based on the synchronization information that is generated by the synchronization information generating means or synchronization information that is extracted by the synchronization information extracting means, for detecting a code of the digital information that is received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping mean, based on the synchronization information that is generated by the synchronization information generating means or synchronization information that is extracted by the synchronization information extracting means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization control means, and then outputting the resulting shaped waveform; and

optical disk manufacturing means for manufacturing an optical disk, based on digital information that is waveshaped by the interface means.

5. An optical disk manufacturing system, comprising:

digital information converting means for converting information to be recorded to digital information;

first interface mean, the first interface means including;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting the synchronization information;

first light-receiving means optically receiving synchronization information that is optically transmitted by the first light-transmitting means;

synchronization controlling means for outputting the digital information from the digital information converting means, in synchronization with the synchronization information that is optically received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitted by the second light-transmitting means;

code detecting means, based on the synchronization information from the synchronization information generating means, for detecting a code of the digital information that is optically received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping mean, based on the synchronization information that is generated by the synchronization information generating means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization control means, and then outputting the resulting shaped waveform;

master recording means for recording digital information that has been waveshaped by the first interface means onto a master recording medium that serves as the original recording medium for the manufacture of an optical disk;

master playback means for playing back digital data from the master recording medium;

second interface means, the second interface means including;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting the synchronization information;

first light-receiving means optically receiving synchronization information that is optically transmitted by the first light-transmitting means;

synchronization controlling means for outputting the digital information from the master playback means, in synchronization with the synchronization information that is optically received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization control means;

second light-receiving means for optically receiving digital information that is optically transmitted by the second light-transmitting means;

code detecting means, based on the synchronization information from the synchronization information generating means, for detecting a code of the digital information that is optically received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping mean, based on the synchronization information that is generated by the synchronization information generating means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization controlling means, and then outputting the resulting shaped waveform; and

optical disk manufacturing means for manufacturing an optical disk, based on the digital information that is waveshaped by the second interface means.

6. An optical disk manufacturing system, comprising:

digital information converting means for converting information to be recorded to digital information;

first interface means, the first interface means including;

synchronization information extracting means for extracting synchronization information that is appended to the digital information from the digital information converting means;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting either synchronization information that is generated by the synchronization information generating means or synchronization information that is extracted by the synchronization information extracting means;

first light-receiving means for optically receiving synchronization information that is optically transmitted by the first light-transmitting means;

synchronization controlling means for outputting the digital information from the digital information converting means, in synchronization with the synchronization information that is optically received by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization controlling means;

second light-receiving means for optically receiving digital information that is optically transmitted from the second light-transmitting means;

code detecting means, based on either the synchronization information from the synchronization information generating means or the synchronization information that is extracted by the synchronization information extracting means, for detecting a code of the digital information that is optically received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping means, based on the synchronization information from the synchronization information generating means or the synchronization information that is extracted by the synchronization information extracting means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization controlling means, and then outputting the resulting shaped waveform;

master recording means for recording digital information that has been waveshaped by the first interface means onto a master recording medium that serves as the original recording medium for the manufacture of an optical disk;

master playback means for playing back digital data from the master recording medium;

second interface means, the second interface means including;

synchronization information extracting means for extracting synchronization information from the digital information from the master playback means;

synchronization information generating means for generating synchronization information having a prescribed period;

first light-transmitting means for optically transmitting either the synchronization information that is generated by the synchronization information generating means or the synchronization information that is extracted by the synchronization information extracting means;

first light-receiving means for optically receiving synchronization information that is optically transmitted by the first light-transmitting means;

synchronization controlling means for outputting the digital information from the digital information converting means, in synchronization with the synchronization information that is optically received from the master playback means by the first light-receiving means;

second light-transmitting means for optically transmitting digital information from the synchronization controlling means;

second light-receiving means for optically receiving digital information that is optically transmitted from the second light-transmitting means;

code detecting means, based on either the synchronization information from the synchronization information generating means or the synchronization information that is extracted by the synchronization information extracting means, for detecting a code of the digital information that is optically received by the second light-receiving means, and outputting the detected code information; and

waveform-shaping mean, based on the synchronization information from the synchronization information generating means or the synchronization information that is extracted by the synchronization information extracting means, for reading the code detection information from the code detecting means, thereby waveshaping the digital information that is optically transmitted from the synchronization controlling means, and then outputting the resulting shaped waveform; and

optical disk manufacturing means for manufacturing an optical disk, based on the digital information that is waveshaped by the second interface means.