Oak Technology, Inc.

Zoran Corporation

Chuanyou Dong

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.

Control of low frequency noise floor in upsampling

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) &ldquo;x&rdquo; 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.

Burst error correction on DVD data

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.

Growing community of inventors

San Jose, CA, United States of America

Chuanyou Dong