Method and apparatus employing an improved format for recording and reproducing digital audio
First Claim
1. A method for recording a signal as digital data in a recording medium, comprising the steps of;
- generating successive series of digital words representing the digital data;
selectively separating alternate words of the series of digital words into respective separate sub-blocks of data;
generating error correction information to define separate sub-blocks thereof;
interspersing error detection and sync information within given locations in each data and error correction sub-blocks; and
recording a selected succession of sub-blocks of data and error correction information within at least two separate tracks in the recording medium to define data blocks with selected inter-block gaps therebetween.
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Accused Products
Abstract
An audio signal is sampled, quantized and the values are stored in a specific digital data block/sub-block format on alternate tracks of a recording medium. The block/sub-block format provides an inherent simplification of error correction techniques, and consists of dividing the digital audio data into groups of digital words, and recording alternate words on separate tracks in the medium. Cyclic redundancy check characters, synchronization, and parity information are selectively interspersed with the data to define sub-blocks which in turn are combined into separate blocks of the block/sub-block arrangement. On reproduce, any errors, dropouts, etc., are detected and corrected or concealed to reconstitute the original audio signal. Editing is facilitated by the separated block arrangement which allows entering and exiting the record mode without destroying any data.
105 Citations
23 Claims
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1. A method for recording a signal as digital data in a recording medium, comprising the steps of;
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generating successive series of digital words representing the digital data; selectively separating alternate words of the series of digital words into respective separate sub-blocks of data; generating error correction information to define separate sub-blocks thereof; interspersing error detection and sync information within given locations in each data and error correction sub-blocks; and recording a selected succession of sub-blocks of data and error correction information within at least two separate tracks in the recording medium to define data blocks with selected inter-block gaps therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a method for recording digital audio data in a recording medium the method for providing an improved digital audio data format comprising the steps of;
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generating successive series of digital words representing the digital audio data; separating the digital words into odd and even sub-blocks of digital audio data; generating a parity sub-block for a given pair of the odd and even data sub-blocks; recording the given pair of data sub-blocks in selected spaced apart relation with their respective parity sub-block to define a triad configuration in two tracks of the recording medium; recording successive triads in the recording medium to define a data block; and recording successive data blocks in the recording medium with selected inter-block gaps therebetween to define the improved format.
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13. A digital recorder for digitally recording an input signal in a recording medium via an improved digital data format, the combination comprising;
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means for generating successive series of digital words representing the input signal; formatter means coupled to the means for generating the digital words and including, means for constructing the digital data format of a succession of precisely spaced apart data blocks formed of a selected arrangement of sub-blocks of said digital words and including respective sub-blocks of parity information, with error detection and sync information interspersed in each data and parity sub-block; and means coupled to the formatter means for simultaneously recording the data blocks in separate tracks in the recording medium with precise inter-block gaps therebetween. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification