Magnetic tape with an R-DAT format

• US 5,019,920 A
• Filed: 04/06/1990
• Issued: 05/28/1991
• Est. Priority Date: 01/07/1987
• Status: Expired due to Fees

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Yoshimoto, Itsuro, Otsuki, Kuniyoshi
• Primary Examiner(s): Envall, Jr., Roy N.
• Assistant Examiner(s): YOUNG, WAYNE R
• Application Number:
  US07/505,986
• Time in Patent Office: 417 Days
• Field of Search: 360/19.1, 360/27, 360/32, 360/8, 360/9.1, 360/14.1-14.3, 360/18, 360/39, 360/40, 360/47, 360/48, 360/49, 369/47-48, 358/335
• US Class Current: 360/27
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 2220/913 Digital audio tape [DAT] format
• CPC Class Codes: G11B 27/032 on tapes G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/107 of operating tapes
• CPC Class Codes: G11B 27/22 Means responsive to presence or absence of recorded information signals
• CPC Class Codes: G11B 27/3063 Subcodes
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 5/9208 involving the use of subcodes

Abstract

In this invention, pack data of a character mode including a character code is generated by a sub-code processor. The pack data is continuously recorded on a magnetic tape for a plurality of frames by rotary heads. When the pack data of the character mode is played back by the rotary heads, a controller detects the character code included in this pack data and supplies the detected code to a display to display corresponding characters.

Claims

1. A magnetic tape on which data is recorded with an R-DAT format for reproduction in frames, comprising:

a plurality of parallel recording tracks oblique to a travel direction of a magnetic tape, a frame being composed of data on two adjacent recording tracks, and with each track having a PCM audio recording area and a sub-code recording area;

said sub-code recording area having sub-code block data recorded therein, which includes sub-code ID data and pack data corresponding to the R-DAT format;

wherein said sub-code ID data includes control ID data which comprises a plurality of independent IDs, one of which is a start ID;

wherein the pack data comprises a set of bits including a plurality of bits of pack item data, and a plurality of bits of data block, a data block in a pack data of a character mode includes character code data and pack address data; and

wherein the sub-code block data includes said pack data of a character mode recorded in said sub-code recording area in the order of the pack address data for a plurality of frames.

2. The magnetic tape according to claim 1, wherein:

the sub-code block data including the pack data of the character mode of a particular pack address data is repetitively recorded for a plurality of frames.

3. The magnetic tape according to claim 1, wherein:

the sub-code block data including the pack data of the character mode is recorded in the sub-code recording area in which the start ID is set to "1"; and

the sub-code block data including the pack data of the character mode of the particular pack address data is repetitively recorded for a plurality of frames.

4. The magnetic tape according to claim 1, wherein the pack data comprises 8 symbols PC1-PC8, and said plurality of bits of pack item data includes 4 bits from symbol P1, and the plurality of bits of data block includes the remainder of symbol PC1 and 52 bits from symbols PC2-PC7, symbol PC8 being a parity block.

5. The magnetic tape according to claim 4, wherein the plurality of independent IDs is four.

6. A magnetic tape with an R-DAT format, comprising:

PCM audio data storing means for storing PCM audio data corresponding to a plurality of programs;

sub-code data storing means, arranged adjacent to the PCM audio data storing means, for storing a sub-code data corresponding to the R-DAT format;

said sub-code data storing means including sub-code ID storing means for storing the sub-code ID corresponding to the R-DAT format and pack data storing means for storing pack data corresponding to the R-DAT format;

said sub-code ID storing means including means for storing control ID having a plurality of independent IDs, one of which is a start ID which is set to "1" at the head portion of each of the programs, for indicating a start portion of each of the plurality of programs;

said pack data storing means including means for storing a pack item indicating a character mode, means for storing pack address data, means for storing character code data, and means for storing a parity data for the pack item, the pack address data, and the character code data; and

said pack address data storing means storing pack address data updated in relation to new character code data being stored in said character code data storing means.

7. A magnetic tape according to claim 6, wherein said pack address data storing means stores a particular pack address data repeatedly, and said character code data storing means stores a particular character code data repeatedly.

8. A magnetic tape according to claim 6, wherein

when said control ID storing means stores the start ID as "1", said pack address data storing means stores a particular pack address repeatedly and also stores the pack address changing continuously, and

when said control ID storing means stores the start ID as "1", said character code storing means stores a particular character code data repeatedly and also stores the character code data indicating continuous characters.

9. A magnetic tape with an R-DAT format, comprising:

PCM audio data storing means for storing PCM audio data including a plurality of programs, such data being adapted for controlling R-DAT apparatus to generate a PCM audio signal;

sub-code data storing means for storing a sub-code data corresponding to the R-DAT format, such data being adapted for controlling the R-DAT apparatus in accordance with the sub-code data;

said sub-code data storing means including sub-code ID storing means for storing the sub-code ID corresponding to the R-DAT format and pack data storing means for storing pack data corresponding to the R-DAT apparatus;

said sub-code ID storing means including means for storing control ID having a plurality of independent IDs, one of which is a start ID which is set to "1" at the head portion of each of the programs, for indicating a start portion of each of the programs to the R-DAT apparatus;

said pack data storing means including means for storing a pack item indicating a character mode, means for storing pack address data indicating the address of the pack data to the R-DAT apparatus, and means for storing character code data indicating the character code data to the R-DAT apparatus in order to display characters, and means for storing a parity data for the pack item, the pack address data, and the character code data for controlling the R-DAT apparatus to perform a parity check operation; and

said pack address data storing means storing pack address data updated in relation to new character code data being stored in said character code data storing means.

10. A magnetic tape according to claim 9, wherein

said pack address data storing means stores a particular pack address data repeatedly for ensuring reproduction of the particular pack address data by the R-DAT apparatus, and said character code data storing means stores a particular character code data repeatedly for ensuring reproduction of the particular character code data by the R-DAT apparatus.

11. A magnetic tape according to claim 9, wherein

when said control ID storing means stores the start ID as "1", said pack address data storing means stores a particular pack address repeatedly for ensuring reproduction of the particular pack address data by the R-DAT apparatus, and also stores the pack address changing continuously, and

when said control ID storing means stores the start ID as "1", said character code storing means stores a particular character code data repeatedly for ensuring reproduction of the particular character code data by the R-DAT apparatus and also stores the character code data indicating continuous characters.

12. A method for recording data on a magnetic tape with an R-DAT format for reproduction in frames, comprising the steps of:

providing a plurality of parallel recording tracks oblique to a travel direction of a magnetic tape, composing a frame with data on two adjacent recording tracks, and providing each track with a PCM audio recording area and a sub-code recording area;

recording sub-code block data in said sub-code recording area, said sub-code block data including sub-code ID data and pack data corresponding to the R-DAT format;

wherein said sub-code ID data includes control ID data which comprises a plurality of independent IDs, one of which is a start ID;

wherein the pack data comprises a set of bits including a plurality of bits of pack item data, and a plurality of bits of data block, a data block in a pack data of a character mode includes character code data and pack address data; and

recording the sub-code block data which includes said pack data of a character mode such that it is recorded in said sub-code recording area in the order of the pack address data for a plurality of frames.

13. A method for recording data on a magnetic tape with an R-DAT format, comprising the steps of:

providing PCM audio data storing means for storing PCM audio data corresponding to a plurality of programs;

arranging sub-code data storing means adjacent to the PCM audio data storing means, for storing a sub-code data corresponding to the R-DAT format;

providing said sub-code data storing means with sub-code ID storing means for storing the sub-code ID corresponding to the R-DAT format and with pack data storing means for storing pack data corresponding to the R-DAT format;

providing said sub-code ID storing means with means for storing control ID having a plurality of independent IDs, and setting one of said plurality of independent IDs, which is a start ID, to "1" at the head portion of each of the programs, for indicating a start portion of each of the plurality of programs;

providing said pack data storing means with means for storing a pack item indicating a character mode, means for storing pack address data, means for string character code data, and means for storing a parity data for the pack item, the pack address data, and the character code data; and

storing in said pack address data storing means pack address data updated in relation to new character code data being stored in said character code data storing means.

14. A method for recording data on a magnetic tape with an R-DAT format, comprising the steps of:

providing PCM audio data storing means for storing PCM audio data including a plurality of programs, such data being adapted for controlling R-DAT apparatus to generate a PCM audio signal;

providing sub-code data storing means for storing a sub-code data corresponding to the R-DAT format, such data being adapted for controlling the R-DAT apparatus in accordance with the sub-code data;

said sub-code data storing means including sub-code ID storing means for string the sub-code ID corresponding to the R-DAT format and pack data storing means for storing pack data corresponding to the R-DAT format;

providing said sub-code ID storing means with means for storing control ID having a plurality of independent IDs, and setting one of said plurality of independent IDs, which is a start ID, to "1" at the head portion of each of the programs, for indicating a start portion of each of the programs to the R-DAT apparatus;

providing said pack data storing means with means for storing a pack item indicating a character mode, means for storing pack address data indicating the address of the pack data to the R-DAT apparatus, and means for string character code data indicating the character code data to the R-DAT apparatus in order to display characters, and means for storing a parity data for the pack item, the pack address data, and the character code data for controlling the R-DAT apparatus to perform a parity check operation; and

storing in said pack address data storing means pack address data updated in relation to new character code data being stored in said character code data storing means.