Digital audio tape record/play-back system for recording/playing back character data together with digital audio data

• US 4,939,595 A
• Filed: 03/14/1989
• Issued: 07/03/1990
• 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): PSITOS, ARISTOTELIS
• Application Number:
  US07/323,618
• Time in Patent Office: 476 Days
• Field of Search: 360/8, 360/19.1, 360/32, 360/33.1
• US Class Current: 386/244
• 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. An apparatus for recording character data together with digital audio data on a magnetic tape by using a rotary head, comprising:

a rotating drum means provided with said rotary head for performing recording on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, and said rotary head including means for recording oblique tracks, each of which has a PCM audio recording area and sub-code recording areas;

signal processing means for receiving the digital audio data, and including means for adding an error correction code to the digital audio data, and for generating PCM audio data complying with an R-DAT format;

source means for supplying the digital audio data to said signal processing means;

travel state input means for designating a travel state of the magnetic tape;

character data input means for inputting character data;

drive means coupled to said travel state input means for driving said magnetic tape and said rotating drum means in response to an operation of said travel state input means;

sub-code processing means for generating sub-code block data having sub-code ID data and pack data corresponding to the R-DAT format, the sub-code ID data including control ID data said control ID data comprising four independent ID'"'"'s, one of said independent ID'"'"'s being a start ID, including 8 symbols PC1-PC8, the symbol PC1 including 4 bits of pack item data, a remainder of the symbol PC1 and the symbols PC2-PC7 including 52 bits of data block, and the symbol PC8 being a parity block;

frame composing means coupled to said signal processing means and to said sub-code processing means, for composing the PCM audio data at a timing corresponding to said PCM audio recording area and the sub-code block data at a timing corresponding to said sub-code recording area, and for outputting the composed data as track format data corresponding to the R-DAT format;

recording means coupled to said rotary head and to said frame composing means, for modulating the track format data and for outputting a recording signal to said rotary head;

control means coupled to said travel state input means, to said character data input means, to said sub-code processing means, and to said mechanism drive means, (1) for controlling said mechanism drive means for setting said magnetic tape and said rotating drum means in a corresponding drive state responsive to operation of said travel state input means, (2) for supplying character code data corresponding to characters input by said character data input means to said sub-code processing means, (3) for controlling said sub-code processing means so that the sub-code processing means generates the sub-code block data including start ID data which is set to "1", and pack data having the character code data of a character mode and (4) for controlling said mechanism drive means for recording the generated sub-code block data in the sub-code recording area of said magnetic tape for a plurality of frames.

2. The apparatus of claim 1, wherein;

the sub-code block data including start ID data which is set to "1", and the pack data having the character code data of the character mode, include the pack address data; and

said sub-code processing means generates the sub-code block data including the pack data of the character mode as it increases the pack address data; and

said control means controls the said mechanism drive means and records the sub-code data including the pack data of the character mode in the sub-code recording area of said magnetic tape for a plurality of frames in the order of address indicated by the pack address data, and also records the sub-code block data including the pack data of the character mode in the particular pack address data in the sub-code recording area of said magnetic tape for a plurality of frames repetitively.

3. The apparatus of claim 2, wherein:

said control means controls said mechanism drive means, and firstly records the sub-code block data including the pack data of the character mode in the sub-code pack recording area of said magnetic tape for a plurality of frames in the order of the address indicated by the pack address data, and also, from the next frame on, records the sub-code block data including the pack data of the character mode of the particular pack address data repetitively in the sub-code recording area of said magnetic tape for a plurality of frames.

4. An apparatus for recording character data together with digital audio data on a magnetic tape by using a rotary head, comprising:

a rotating drum means provided with said rotary head for performing recording on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, and said rotary head including means for recording oblique tracks, each of which has a PCM audio recording area and sub-code recording areas;

signal processing means for receiving the digital audio data, and including means for adding an error correction code to the digital audio data and for generating PCM audio data complying with an R-DAT format;

source means for supplying the digital audio data to said signal processing means;

travel state input means for designating a travel state of the magnetic tape;

character data input means for inputting character data;

drive means coupled to said travel state input means for driving said magnetic tape and said rotating drum means in response to an operation of said travel state input means;

sub-code processing means for generating sub-code block data having sub-code ID data and pack data corresponding to the R-DAT format;

said sub-code ID data including control ID data, the control ID data comprising four independent ID'"'"'s, one of said independent ID'"'"'s being a start ID and said pack data including 8 symbols PC1-PC8, the symbol PC1 including 4 bits of pack item data, the reminder of the symbol PC1 and the symbols PC2-PC7 including 52 bits of data block, the data block including pack address data, and the symbol PC8 being a parity block;

frame composing means coupled to said signal processing means and to said sub-code processing means, for composing the PCM audio data at a timing corresponding to said PCM audio recording area and the sub-code block data at a timing corresponding to said sub-code recording area, and for outputting the composed data as track format data corresponding to the R-DAT format;

recording means coupled to said rotary head and to said frame composing means, for modulating the track format data and for outputting a recording signal to said rotary head;

control means, coupled to said travel state input means, to said character data input means, to said sub-code processing means, and to said mechanism drive means, (1) for controlling said mechanism drive means for setting said magnetic tape and said rotating drum means in a corresponding drive state responsive to operation of said travel state input means, (2) for supplying character code data corresponding to characters input by said character data input means to said sub-code processing means, (3) for controlling said sub-code processing means so that the sub-code processing means generates the sub-code block data including the pack data of the character mode, having the character code data and the pack address data, and (4) for controlling said mechanism drive means for repetitively recording the sub-code block data which includes the pack data having the pack address data being equal thereto, in the sub-code recording area of said magnetic tape for a plurality of frames.

5. An apparatus for recording character data together with digital audio data on a magnetic tape by using a rotary bead, comprising:

a rotating drum means provided with said rotary head for performing recording on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, said rotary head recording oblique tracks, each of which has a PCM audio recording area and sub-code recording areas;

signal processing means for receiving the digital audio data, and including means for adding error correction code to the digital audio data, and for generating PCM audio data complying with an R-DAT format;

source means for supplying the digital audio data to said signal processing means;

travel state input means for designating a travel state of the magnetic tape;

character data input means for inputting character data;

drive means coupled to said travel state input means for driving said magnetic tape and said rotating drum means in response to an operation of said travel state input means;

sub-code processing means for generating sub-code block data having sub-code ID data and pack data corresponding to the R-DAT format;

said sub-code ID data includes a control ID data, the control ID including four independent ID'"'"'s, one of said independent ID'"'"'s being a start ID data and said pack data including 8 symbols PC1-PC8, the symbol PC1 including 4 bits of pack item data, the remainder of the symbol PC1 and the symbols PC2-PC7 including 52 bits of data block, the data block including pack address data and the symbol PC8 being a parity block;

frame composing means coupled to said signal processing means and to said sub-code processing means, for composing the PCM audio data at a timing corresponding to said PCM audio recording area and the sub-code block data at a timing corresponding to said sub-code recording area, and for outputting the composed data as track format data corresponding to the R-DAT format;

recording means coupled to said rotary head and to said frame composing means, for modulating the track format data and for outputting a recording signal to said rotary head;

control means coupled to said travel state input means, to said character data input means, to said sub-code processing means, and to said mechanism drive means, (1), for controlling said mechanism drive means for setting said magnetic tape and said rotating drum means in a corresponding drive state responsive to operation of said travel state input means, (2) for supplying character code data corresponding to characters input by said character data input means to said sub-code processing means, (3) for controlling said sub-code processing means so that the sub-code processing means generates the sub-code block data including the pack data having the character code data and the pack address data of the character mode as it increases the pack address data;

said control means controls said mechanism drive means and records the sub-code block data including the pack data of the character mode in the sub-code recording area of said magnetic tape for a plurality of frames in the order of the address indicated by the pack address data, and also records the sub-code block data including the pack data of the character mode in the particular pack address data in the sub-code recording area of said magnetic tape for a plurality of frames repetitively.

6. The apparatus of claim 5, wherein:

said control means controls said mechanism drive means, and firstly records the sub-code block data including the pack data of the character mode in the sub-code pack recording area of said magnetic tape for a plurality of frames in the order of the address indicated by the pack address data, and also, from the next frame on, records the sub-code block data including the pack data of the character mode of the particular pack address data repetitively in the sub-code recording area of said magnetic tape for a plurality of frames.

7. An apparatus for playing back character data together with digital audio data on a magnetic tape by using a rotary head, comprising:

a rotating drum means provided with said rotary head for playing back a signal recorded on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, said magnetic tape having tracks, each of which are including a PCM audio recording area for recording PCM audio data and sub-code recording area for recording sub-code block data, the PCM audio data being data corresponding to an R-DAT format including the error correction code and the digital audio data, the sub-code block data being data corresponding to the R-DAT format and including the error correction code and the digital audio data the sub-code block data being data corresponding to the R-DAT format and including sub-code ID and pack data, wherein the sub-code ID includes control ID, the control ID comprises four independent ID'"'"'s, one of which is start ID, the pack data is composed of 8 symbols PC1-PC8, the symbol PC1 including 4 bits of pack item data, the remainder of the symbol PC1 and the symbols PC2-PC7 including 52 bits of data block, and the symbol PC8 being a parity block; and

the pack data of the character mode being recorded in the sub-code recording area of said magnetic tape for a plurality of frames;

travel state input means for designating a travel state of the magnetic tape;

drive means coupled to said travel state input means, for driving said magnetic tape and said rotating drum means in response to an operation of said travel state input means;

frame decomposing means, coupled to said rotary head, for decomposing and outputting the PCM audio data at a timing corresponding to said PCM audio recording area and sub-code block data at a timing corresponding to the sub-code recording area from a play-back signal played back by said rotary head;

signal processing means coupled to said frame decomposing means, for receiving the PCM audio data from said frame decomposing means and performing error correction processing to output digital audio data;

sub-code processing means coupled to said frame decomposing means, for receiving the sub-code block data from aid frame decomposing means and storing the sub-code ID and the pack data included in the sub-code block data; and

display means for displaying data;

control means coupled to said travel state input means, to said mechanism drive means, to said sub-code processing means, and to said display means, for controlling said mechanism drive means so that said magnetic tape and said rotating drum means are set in play-back state response to operation of said travel state input means, storage of the pack data of character mode in said sub-code processing means is detected and the character code data in the back data of the character mode is supplied to said display means to cause said display means to display character corresponding to the character code data.

8. An apparatus for playing back character data together with digital audio data on a magnetic tape by using a rotary head, comprising:

a rotating drum means provided with said rotary head for playing back a signal recorded on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, said magnetic tape having tracks, each of which are including a PCM audio recording area for recording PCM audio data and sub-code recording area for recording sub-code block data, the PCM audio data being data corresponding to an R-DAT format and including error correction code and the digital audio data, the sub-code block data being data corresponding to the R-DAT format and including sub-code ID and pack data, wherein the sub-code ID includes control ID, the control ID comprises four independent ID'"'"'s, one of which is start ID, the pack data is composed of 8 symbols PC1-PC8, the symbol PC1 including 4 bits of pack item of the character mode, the remainder of the symbol PC1 and the symbols PC2-PC7 including 52 bits of data block of the character mode, the data block of the character mode includes character code data and pack address data, symbol PC8 being a parity block, and the pack data of the character mode is recorded in the sub-code recording area where the start ID being set to "1" is recorded, in the order of the pack address data for a plurality of frames;

travel state input means for designating a travel state of the magnetic tape;

drive means coupled to said travel state input means, for driving said magnetic tape and said rotating drum means in response to an operation of said travel state input means;

frame decomposing means coupled to said rotary head, for decomposing and outputting the PCM audio data at a timing corresponding to said PCM audio recording area and sub-code block data at a timing corresponding to the sub-code recording area from a play-back signal played back by said rotary head;

signal processing means coupled to said frame decomposing means, for receiving the PCM audio data from said frame decomposing means and performing error correction processing to output digital audio data;

sub-code processing means, coupled to said frame decomposing means, for receiving the sub-code block data from said frame decomposing means and storing the sub-code ID and the pack data included in the sub-code block data; and

display means for displaying data;

control means coupled to said travel state input means, to said mechanism drive means, to said sub-code processing means, and to said display means, for controlling said mechanism drive means so that said magnetic tape and said rotating drum means are set in play-back state response to operation of said travel state input means, storage of the pack data of character mode in said sub-code processing means is detected and the character code data in the pack data of the character mode is supplied to said display means to cause said display means to display character corresponding to the character code data.

9. An apparatus for playing back character data together with digital audio data on a magnetic tape by using a rotary head, comprising:

a rotating drum means provided with said rotary head for playing back a signal recorded on said magnetic tape, said magnetic tape being wound around said rotating drum means within a predetermined angular range, said magnetic tape having tracks, each of which are including a PCM audio recording area for recording PCM audio data and sub-code recording area for recording sub-code block data, the PCM audio data being data corresponding to an R-DAT format and including error correction code and the digital audio data, the sub-code block data being data corresponding to the R-DAT format and including sub-code ID and pack data, wherein the sub-code ID includes control ID, the control ID comprises four independent ID'"'"'s, one of which is start ID, the pack data includes pack data of a character mode, the pack data of a character mode is composed of 8 symbols PC1-PC8, symbol PC1 includes 4 bits of pack item of the character mode, the remainder of the symbol PC1 and the symbols PC2-PC7 compose 52 bits of data block of the character mode, the data block of the character mode includes character code data and pack address data, symbol PC8 is a parity block, and the pack data of the character mode is recorded in the sub-code recording area where the start ID being set to "1" is recorded, in the order of the pack address data for a plurality of frames, and also the pack data of the character mode including the particular pack address data is recorded in the sub-code recording area where the start ID being set to "1" is recorded, repetitively for a plurality of frames;

travel state input means for designating a travel state of the magnetic tape;

drive means coupled to said travel state input means, for driving said magnetic tape and said rotating drum means in response to operation of said travel state input means;

frame decomposing means, coupled to said rotary head, for decomposing and outputting the PCM audio data at a timing corresponding to said PCM audio recording area and sub-code block data at a timing corresponding to the sub-code recording area from a play-back signal played back by said rotary head;

signal processing means coupled to said frame decomposing means, for receiving the PCM audio data from said frame decomposing means and performing error correction processing to output digital audio data;

sub-code processing means, coupled to said frame decomposing means, for receiving the sub-code block data from said frame decomposing means and storing the sub-code ID and the pack data included in the sub-code block data; and

display means for displaying data;

control means coupled to said travel state input means, to said mechanism drive means, to said sub-code processing means, and to said display means for controlling said mechanism drive means so that said magnetic tape and said rotating drum means are set in play-back state response to operation of said travel state input means, storage of the pack data of character mode in said sub-code processing means is detected and the character code data in the pack data of the character mode is supplied to said display device in the order indicated by the pack address data to cause said display means to display character corresponding to the character code data.

10. The apparatus according to claim 9, wherein the PCM audio data for a plurality of programs are recorded on said magnetic tape, and the pack data of the character mode are recorded in the sub-code recording area of each program for a plurality of frames,

said travel state input means inputs a search state for selecting a desired program, and also includes a means for inputting the character data,

said control means controls said mechanism drive means in accordance with the operation of the search state of said travel state input means so that said magnetic tape and said rotating drum means are in the state of high-speed play-back, comprise the character code data of the pack data of the character mode having the particular pack address data included in the sub-code block data which is recorded in the sub-code recording area, with the character data input by said travel state input means, and reproduce the program in which the sub-code block data including the pack data having the character code data equal to the input character.