Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
A disc playing apparatus for playing a disc on which a digital information signal divided into blocks is recorded as a subcode together with a block identification signal for identifying the blocks, in addition to a coded information signal, comprising: a reading means for reading said coded information signal and said subcode from said disc; a decoding means for decoding the subcode and producing an information signal; a repeating means for repeating the subcode read out by said reading means to said decoding means in response to a repeat command; and a control means for controlling said reading means and said repeating means, wherein said control means generates, in response to a command, a jump command for moving an information reading point of said reading means across M (M is a natural number) tracks in a direction retracing a reading direction every time a predetermined time period corresponding to the relative position of the information reading point in a radial direction of the disc elapses; detects, during a period between issuing of the jump command and issuing of the next jump command, an N-block period, in which N (N is a natural number) blocks of the subcode are read out, by means of a block identification signal obtained from an output signal of the reading means; and supplies a repeating command to the repeating means only during the N-block period.
Claim 2
Dependent Claim
230 words
A disc playing apparatus for playing a disc on which a digital information signal divided into blocks is recorded as a subcode together with a block identification signal for identifying the blocks, in addition to a coded information signal, comprising: a reading means for reading said coded information signal and said subcode from said disc; a decoding means for decoding the subcode and producing an information signal; a repeating means for repeating the subcode read out by said reading means to said decoding means in response to a repeat command; and a control means for controlling said reading means and said repeating means, wherein said control means generates, in response to a command, a jump command for moving an information reading point of said reading means across M (M is a natural number) tracks in a direction retracing a reading direction every time a predetermined time period corresponding to the relative position of the information reading point in a radial direction of the disc elapses; detects, during a period between issuing of the jump command and issuing of the next jump command, an N-block period, in which N (N is a natural number) blocks of the subcode are read out, by means of a block identification signal obtained from an output signal of the reading means; and supplies a repeating command to the repeating means only during the N-block period.
Claim 3
Dependent Claim
79 words
An apparatus as claimed in claim 1, wherein said predetermined time period is shorter than a time period required for said disc to rotate M times by a time period obtained by the summation between a time period required for reading at least N-blocks of the subcode and a time period required for a jump of said information reading point, and wherein N-blocks of said subcode are read out successively in the order of recording every said N-block period.
Claim 4
Dependent Claim
83 words
An apparatus as claimed in claim 1, wherein said predetermined time period is shorter than a time period required for said disc to rotate M times by a time period obtained by the summation between a time period required for reading at least 2N-blocks of the subcode and a time period required for a jump of said information reading point, and wherein N-blocks of said subcode are read out successively in an order reverse to the order of recording every said N-block period.