Compact disk players
AssigneeSony Corporation
InventorsKazutoshi Shimizume, Junichi Aramaki
Life of this patent
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Abstract
In a compact disk player, a demodulator (2) demodulates signals picked up from a disk, an error detection circuit (8) corrects the demodulated data, and an interpolation circuit (10, 12, 14, 16) interpolates output data from the error detection correction circuit according to a result of the error correction. A level setting circuit (10, 12, 16) sets to zero the level of data which has not been error corrected in a peak search, according to the error correction result, and a peak level detection circuit (20, 22, 24, 26) detects a peak level of digital audio signals outputted by the level setting circuit.
Claims6
A compact disk player comprising:
- a demodulation circuit for demodulating a signal outputted from a pickup to produce demodulated data;
- an error detection correction circuit for error correcting said demodulated data to produce output data;
- an interpolation circuit for interpolating said output data from said error detection correction circuit according to a result of said error correction effected by said error detection correction circuit to thereby output a digital audio signal;
- a level setting circuit for setting a signal level of data, which has not been error corrected in a peak search, to a zero level, according to said error correction result of said error detection correction circuit, and outputting said digital audio signal;
- and
- a peak level detection circuit for detecting a peak level of said digital audio signal outputted by said level setting circuit.
A compact disk player comprising:
- a demodulation circuit for demodulating signals reproduced from a compact disk to produce demodulated data;
- an error detection correction circuit operative to error correct said demodulated data and to produce a predetermined flag in the case of data not subjected to error correction;
- a level setting circuit responsive to said flag to set a signal level of data which has not been error corrected in a peak search, to a zero level and operative to output digital audio signals;
- and
- a peak level detection circuit for detecting a peak level of said digital audio signals outputted by said level setting circuit.
Dependencies are inferred from the claim text.