US 2003/0077075 A1 · COMBINED DVD/CD DATA PROCESSOR

Abstract

A combined DVD/CD (Digital Video Disk/Compact Disk) data processor used in a DVD/CD player. The DVD/CD data processor includes a PLL (Phase Locked Loop) to receive a pulse stream input to generate a PLL clock; a frame/ID synchronization detector to latch the pulse stream according to the PLL clock, to generate a symbol clock; a demodulator to EFM+ demodulate the pulse stream according to the symbol clock in a DVD mode, and EFM demodulate the pulse stream according to the symbol clock in a CD mode; an ECC demodulator to error-correct input data according to a predetermined code length and error correction range, the predetermined code length and error correction range having different values in the DVD and CD modes; a memory to store the demodulated data to provide the ECC demodulator with the demodulated data stored therein; a descrambler to descramble the error corrected data stored in the memory, in the DVD mode; and a CD audio processor to process the error corrected data stored in the memory, in the CD mode.

Claims19

Dependent claims

A combined DVD (Digital Video Disk)/CD (Compact Disk) data processor to process a pulse stream of data from a DVD or a CD, comprising:

a PLL (Phase Locked Loop) to receive the pulse stream, to generate a PLL clock;
a frame/ID (identification) synchronization detector to latch the pulse stream according to said PLL clock, to generate a symbol clock;
a demodulator to EFM+ demodulate the pulse stream according to the symbol clock in a DVD mode, and EFM demodulate the pulse stream according to the symbol clock in a CD mode, to generate demodulated data;
a memory to store the demodulated data from said demodulator;
an ECC (error checking and correction) demodulator to error-correct the demodulated data stored in said memory according to a predetermined code length and error correction range, the predetermined code length and error correction range having different values in the DVD and CD modes, to generate error corrected data;
a descrambler to descramble the error corrected data stored in said memory, in the DVD mode;
and
a CD audio processor to process the error corrected data stored in said memory, in the CD mode.

5 more elements

A combined DVD (Digital Video Disk)/CD (Compact Disk) data processor to process first and second pulse streams from a DVD and a CD, respectively, comprising:

a PLL (Phase Locked Loop) to receive the first and second pulse streams, to generate respective first and second PLL clocks;
a frame/ID (identification) synchronization detector to latch the first and second pulse streams according to the respective first and second PLL clocks, to generate respective first and second symbol clocks;
a demodulator to perform a first type of demodulation on the first pulse stream according to the first symbol clock to generate first demodulated data of a DVD mode, and a second type of demodulation on the second pulse stream according to the second symbol clock to generate second demodulated data of a CD mode;
a memory to store the first and second demodulated data;
and
an ECC (error checking and correction) demodulator to error correct the first demodulated data stored in said memory in accordance with a first predetermined code length and error correction range and to store the error corrected first demodulated data back in said memory, and to error correct the second demodulated data stored in said memory in accordance with a second predetermined code length and error correction range and to store the error corrected second demodulated data back in said memory.

3 more elements

A combined DVD (Digital Video Disk)/CD (Compact Disk) data processor to process first and second pulse streams from a DVD and a CD, respectively, comprising:

a demodulator to demodulate the first and second pulse streams in a DVD mode and a CD mode, respectively, to generate first and second demodulated data, respectively;
a memory to store the first and second demodulated data;
and
an ECC (error checking and correction) demodulator to error correct the first demodulated data stored in said memory in accordance with a first predetermined code length and error correction range in the DVD mode, and to error correct the second demodulated data stored in said memory in accordance with a second predetermined code length and error correction range in the CD mode.

1 more element

Dependencies are inferred from the claim text.

Combined dvd/cd data processor

Life of this patent

Combined dvd/cd data processor

Life of this patent

Abstract

Claims19