System for recording and reproducing digital audio signal
First Claim
1. A system for reproducing digital audio data from a recording medium on which said digital audio data are recorded with video data, said digital audio data being rearranged from an original data format to a plurality of segments thereof as recorded on said recording medium, wherein L segments of said digital audio data correspond to one field of said video data (where L is an integer at least equal to 1), each of said segments including plural samples of said digital audio data, the number of said samples in segments corresponding to each said field of M fields out of N fields being different from the number of samples in at least one of the segments corresponding to the remaining N - M fields (where M and N are integers and N is greater than M), each of said segments further including identification data indicating field numbers 1 through N to which each said segment corresponds, said system comprising:
- means for detecting said identification data in each segment of said digital audio data;
means for detecting an error in said identification data;
means for deriving from said identification data numbering data 1 through the product of the number of segment L and the number of fields N, said numbering data indicating the sequence of each said segment in a set of said N fields;
means for providing a clock signal having a period corresponding to one of said segments;
means for detecting the presence of an error in said identification data;
counter means into which said numbering data derived from said identification data is loaded when no error is detected in said identification data and which counts said clock signal when an error is detected in said identification data; and
means for reconstructing said digital audio data in said original data format in response to an output of said counter means.
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Abstract
A system is provided for reproducing digital audio data from a recording medium on which segments of digital audio data are recorded with video data, with three segments of the digital audio data corresponding to one field of the video data, each segment including plural samples of the digital audio data, the number of the samples in four out of every five fields being different from that of remaining one of such five fields, and each segment further including identification data indicating field numbers to which each segment belongs. The system detects the identification data in each segment of the digital audio data and whether or not an error appears in the identification data, whereupon, numbering data 1 through 15 (=3×5) are derived from the identification data for indicating the phase of each segment in a set corresponding to the periods of the 5 fields. The numbering data derived from the identification data is loaded into a counter when no error is detected in the identification data and, when an error is detected in the identification data, the counter counts a clock signal having a period corresponding to one segment. The digital audio data is reconstructed according to the output of the counter.
37 Citations
12 Claims
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1. A system for reproducing digital audio data from a recording medium on which said digital audio data are recorded with video data, said digital audio data being rearranged from an original data format to a plurality of segments thereof as recorded on said recording medium, wherein L segments of said digital audio data correspond to one field of said video data (where L is an integer at least equal to 1), each of said segments including plural samples of said digital audio data, the number of said samples in segments corresponding to each said field of M fields out of N fields being different from the number of samples in at least one of the segments corresponding to the remaining N - M fields (where M and N are integers and N is greater than M), each of said segments further including identification data indicating field numbers 1 through N to which each said segment corresponds, said system comprising:
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means for detecting said identification data in each segment of said digital audio data; means for detecting an error in said identification data; means for deriving from said identification data numbering data 1 through the product of the number of segment L and the number of fields N, said numbering data indicating the sequence of each said segment in a set of said N fields; means for providing a clock signal having a period corresponding to one of said segments; means for detecting the presence of an error in said identification data; counter means into which said numbering data derived from said identification data is loaded when no error is detected in said identification data and which counts said clock signal when an error is detected in said identification data; and means for reconstructing said digital audio data in said original data format in response to an output of said counter means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for recording and reproducing digital audio data and video data on a recording medium, comprising:
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recording means for recording said digital audio data together with said video data on the recording medium, said digital audio data being rearranged from an original data format to a plurality of segments each including plural samples of said digital audio data so that one field of said video data corresponds to L segments of said digital audio data (where L is an integer at least equal to
1), the number of said samples in segments corresponding to each said field of M fields out of N fields being different from the number of samples in at least one of the segments corresponding to the remaining N - M fields (where M and N are integers and N is greater than M), each of said segments including identification data indicating field numbers 1 through N to which each said segment corresponds;means for reproducing said digital audio data from said recording medium; means for detecting said identification data in each said segment of said digital audio data; means for detecting an error in said identification data; means for deriving from the detected identification data numbering data 1 through the product L times N, said numbering data indicating the sequence of each said segment in a set of said N fields; means for providing a clock signal having a period corresponding to one of said segments; means for detecting the presence of an error in said identification data; counter means into which said numbering data derived from said identification data is loaded when no error is detected in said identification data and which counts said clock signal when an error is detected in said identification data; and means for reconstructing said digital audio data in said original data format in response to an output of said counter means. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification