Chuanyou Dong

6779149, Aug 17, 2004

Jul 31, 2000

09/629082

Chuanyou Dong - San Jose CA

Oak Technology, Inc. - Sunnyvale CA

H03M 1300

714762, 714755

Method and system for indicating that at least one row or column of a DVD data block has an uncorrectable number of errors, by marking or flagging the corrupted codewords of a codeword with defect detect signals. When a column (or row) of the data block is found to contain more than a thereshold number of errors, a selected number w of distinguishable codeword values (DSVs) âxâ is associated with at least one column (or with at least one row) of the block. When the block is further processed and the presence of more than a threshold number of DSVs is sensed, the system interprets this occurrence as indicating that an uncorrectable group of errors has occurred in a column and/or row of the block.

6883013, Apr 19, 2005

Jun 30, 2000

09/608474

Chuanyou Dong - San Jose CA, US

Zoran Corporation - Sunnyvale CA

G06F017/10

708303

Method and system for adjusting or controlling a noise floor of a filtered signal for low frequencies. A filtered digital signal, having M bits, is processed to form an one-bit XOR signal. This XOR signal is added to the filtered signal to produce a modified filtered signal. A selected number of LSB bits of the modified filtered signal is removed to form a dithered filtered signal with a noise floor that is reduced for low frequencies.

6757861, Jun 29, 2004

Jul 31, 2000

09/629081

Chuanyou Dong - San Jose CA

Oak Technology, Inc. - Sunnyvale CA

H03M 1300

714761, 714704

Method and system for incdicating that at least one C codeword or C codeword of a CD data block has an uncorrectable number of errors, by marking or flagging the corrupted symbols of a codeword with defect signals. When a C codeword (or C codeword) of the data block is found to contain more than a threshold number of errors, a selected number w of distinguishable symbol values (DSVs) is associated with at least one C codeword (or with at least one C codeword) of the block. When the block is further processed and the presence of more than a threshold number of DSVs is sensed, the system interprets this occurrence as indicating that an uncorrectable group of errors has occurred in a C codeword and/or in a C codeword of the block.