Digital audio tape recorder
First Claim
1. A searching apparatus of a digital audio tape recorder for taking out information by a plurality of rotary magnetic heads int he state in which a magnetic tape with digital data recorded thereon is travelling at a speed higher then the normal speed, said searching apparatus comprising:
- a parity detecting means for detecting the parity of said digital data read out by said rotary magnetic heads, including;
a judging means for judging whether or not said parity of said digital data which are read out by said plurality of rotary magnetic heads while tracing tracks on said magnetic tape in the state in which said magnetic tape is travelling at a high speed in the forward or backward direction is identified with a preset parity;
a counting means for counting the number of identified parities of said digital data for each of said plurality of rotary magnetic heads; and
a comparing means for comparing the numbers of identified parities between the digital data read out by said plurality of rotary magnetic heads;
a processing means for processing said digital data in accordance with the result of the detection by said parity detecting means, including a digital data selecting means for judging the digital data to have a lower reliability, said digital data being read out by the rotary magnetic head which is proved by said comparing means to have supplied the digital data having a smaller number of identified parities.
1 Assignment
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Accused Products
Abstract
A digital audio tape recorder having a function of reproducing the magnetic tape with digital data recorded thereon in the state of high-speed travelling by a plurality of rotary heads for the purpose of high-speed search and cue/review. In high-speed search, the parity of the read digital data is checked to select the digital data identified by the greatest majority. The data are selected after discriminating the data supplied from the sub code area 1 from the data supplied from the sub code area 2 in REW search but without such discrimination in FF search. In cue/review, the number of identified parities is counted for each of the plurality of rotary heads. The digital data read out by the magnetic head which has supplied the digital data having a smaller number of identified parities is prevented from reproduction. The digital data read out by the magnetic head which has supplied the digital data having a larger number of identified parities is interpolated and reproduced.
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Citations
11 Claims
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1. A searching apparatus of a digital audio tape recorder for taking out information by a plurality of rotary magnetic heads int he state in which a magnetic tape with digital data recorded thereon is travelling at a speed higher then the normal speed, said searching apparatus comprising:
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a parity detecting means for detecting the parity of said digital data read out by said rotary magnetic heads, including; a judging means for judging whether or not said parity of said digital data which are read out by said plurality of rotary magnetic heads while tracing tracks on said magnetic tape in the state in which said magnetic tape is travelling at a high speed in the forward or backward direction is identified with a preset parity; a counting means for counting the number of identified parities of said digital data for each of said plurality of rotary magnetic heads; and a comparing means for comparing the numbers of identified parities between the digital data read out by said plurality of rotary magnetic heads; a processing means for processing said digital data in accordance with the result of the detection by said parity detecting means, including a digital data selecting means for judging the digital data to have a lower reliability, said digital data being read out by the rotary magnetic head which is proved by said comparing means to have supplied the digital data having a smaller number of identified parities. - View Dependent Claims (2, 3, 4)
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5. A searching apparatus, of a digital audio tape recorder for taking out information by a plurality of rotary magnetic heads in the state in which a magnetic tape with digital data recorded thereon is travelling at a speed higher then the normal speed, said searching apparatus comprising:
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a parity detecting means for detecting the parity of said digital data read out by said rotary magnetic heads, including; a parity judging means for judging whether or not the parity of the digital data read out by said plurality of rotary magnetic heads while tracing across a plurality of tracks on said magnetic tape in the state in which said magnetic tape is travelling at a high speed in the forward or backward direction is identified with a preset parity; and a processing means for processing said digital data in accordance with the result of the detection by said parity detecting means, including; a storing means for storing said digital data every time said parity is identified; a comparing means for detecting the identity of the current digital data with the digital data stored in said storing means every time a new parity is identified; a counting means for counting the number of items of identified digital data detected by said comparing means; and a selecting means for selecting the greatest number of items of identified digital data obtained by said counting means so as to obtain the recording information of said magnetic tape which is travelling at a high speed on the basis of said digital data selected by said selecting means. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification