Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Reexamination Certificate
1999-09-17
2001-10-09
Dinh, Tan (Department: 2651)
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
Reexamination Certificate
active
06301202
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a reproduction apparatus and a reproduction method for reproducing data from a recording medium comprising a program area provided in advance with absolute addresses and a controlled area storing the absolute start address of each program recorded on it in correspondence to the program number thereof.
2. Related Background Art
The digital audio interface output of known compact disk (CD) players is adapted to produce, in addition to digital audio data, channel status data including a category code for identifying the CD category of the CD disk to be played and user data comprising Q codes, each including a track number and the elapsed time of a piece of music on the track.
On the other hand, many known digital recording apparatus using a digital audio tape (DAT) or a mini-disk (MD) as recording medium are designed to automatically record start IDs and track numbers on the recording medium for a great convenience of the user on the basis of the CD category identified by decoding the channel status data and the sub-data including the track numbers and the elapsed time of each piece of music recorded on the CD to be replayed as detected by decoding the Q code of the user data.
Meanwhile, in recent years, standards for optical disks that are different from known CDs and adapted to record high speed 1-bit digital audio signals for music have been proposed. Audio data addressed by the proposed standards are 1-bit audio signals obtained by subjecting corresponding analog audio signals to a delta-sigma (&Dgr;&Egr;) modulation process. A 1-bit audio signal is sampled with a very high sampling frequency that is 64 times as high as the sampling frequency of 44.1 KHz of ordinary CDs. The signal is expressed in terms of a very high sampling frequency and a data word length with a very small number of quantization bits and hence characterized by a wide transmission frequency band. Additionally, due to the &Dgr;&Egr; modulation, it can secure a wide dynamic range in the audio band that is a low frequency band relative to the over-sampling frequency that is 64 times as high as the sampling frequency of ordinary CDs.
An optical disk deals with high speed 1-bit audio signals conforming to the proposed standards for new digital audio signals and shows audio characteristics by far more excellent than those of known CDs. However, a recording system totally different from that of known CDs has to be used for it and hence is not compatible with known CDs in terms of information on the track numbers and the elapsed time of each piece of music as contained in the sub-data as well as other data.
On the other hand, disk replaying apparatus that can replay music from both an ordinary CD and a disk of a new type carrying high speed 1-bit audio signals are known. The user of such an apparatus may want to get information on the audio signals recorded on the CD and also on the audio signals recorded on the new type disk particularly in terms of the serial number of each recorded piece of music and the elapsed time from the start. However, to date, such information can not be displayed for the disks of the two different types by means of a single display system.
SUMMARY OF THE INVENTION
In view of the above circumstances, it is therefore the object of the present invention to provide a reproduction apparatus and a reproduction method that can transform and generate channel status data and user data in a format equivalent to that of CDs and display auxiliary data such address the number and the elapsed time of each piece of music when reproducing data from a disk storing digital audio signals in a format different from that of CDs.
According to a first aspect of the invention, the above object is achieved by providing a reproduction apparatus adapted to reproduce data from a recording medium comprising a program area provided with absolute addresses and a controlled area storing the absolute start address of each of the programs stored on it in correspondence to the program number thereof, said apparatus comprising:
a reproduction means for reproducing data from the controlled area and the program area of said recording medium;
a memory means for storing the start address of each program contained in the controlled area operated by said reproduction means for data reproduction and expressed in terms of absolute address in correspondence to the program number of the program;
a comparison means for comparing the absolute address reproduced from said program area by said reproduction means with the start address of each program stored in said memory means in correspondence to the program number of the program; and
a selection means for selecting the program number corresponding to the position on said program area being operated by said reproduction means for data reproduction.
According to a second aspect of the invention, there is provided a reproduction apparatus adapted to selectively reproduce data from a first recording medium having a program area collaterally storing program numbers and the passed-by addresses of each program in addition to information on the programs stored on it and a controlled area for controlling the start address of each of the programs expressed in terms of absolute address in correspondence to the program number of the program or a second recording medium having a program area storing a plurality of programs provided with absolute addresses and a controlled area for controlling the start address of each program expressed in terms of absolute address in correspondence to the program number thereof, said apparatus comprising:
a reproduction means for reproducing data from the controlled area and the program area of said selected recording medium;
a memory means for storing the start address of each program contained in the controlled area of the second recording medium operated by said reproduction means for data reproduction and expressed in terms of absolute address in correspondence to the program number of the program;
a comparison means for comparing the absolute address reproduced from said program area of said second recording medium by said reproduction means with the start address of each program stored in said memory means in correspondence to the program number of the program; and
a display control means for displaying, upon selection of said first recording medium, the program number corresponding to the position on said program area being operated by said reproduction means for data reproduction on the basis of the program numbers stored collaterally in said program area and, upon selection of said second recording medium, the program number corresponding to the position on said program area being operated by said reproduction means for data reproduction on the basis of the result of comparison of said comparison means.
According to a third aspect of the invention, there is provided a reproduction apparatus adapted to selectively reproduce data from a first layer having a program area collaterally storing program numbers and the passed-by addresses of each program in addition to information on the programs stored on it and a controlled area for controlling the start address of each of the programs expressed in terms of absolute address in correspondence to the program number of the program or a second layer having a program area storing a plurality of programs provided with absolute addresses and a controlled area for controlling the start address of each program expressed in terms of absolute address in correspondence to the program number thereof, said apparatus comprising:
a reproduction means for reproducing data from the controlled area and the program area of said selected layer;
a memory means for storing the start address of each program contained in the controlled area of the second layer operated by said reproduction means for data reproduction and expressed in terms of absolute address in correspondence to the program number of the program;
a comparison means for comparing the ab
Dinh Tan
Maioli Jay H.
Sony Corporation
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