Abstract: A decoding method for unary/kth order exponential Golomb (UEGk) codes is provided. The first step is a receiving step: receiving N bits from an input stream and updating a bit count. If the N bits are all one, the receiving step is re-performed. If the N bits includes zero, a searching step is performed to find a first value based on the bit count. Subsequently, according to the bit count and a threshold value, a remaining bit number M is calculated. A second value is generated based on M remaining bits received from the input stream. Then, the first value and the second value are added, so as to generate an index.

Abstract: A video codec method is provided, for processing video data processed by a Discrete Cosine Transformation (DCT) operation, comprising: (a) if a transformation matrix having a plurality of coefficients comprises at least one non-integer coefficient among the coefficients, multiplying the transformation matrix by a multiplication factor ? to make all coefficients of the transformation matrix integers, (b) estimating a compensation set, (c) performing a Column in Row out IDCT two-dimensional operation on the video data according to the transformation matrix and the compensation set, to obtain a compensated two-dimension operation result, (d) selectively dividing the compensated two-dimension operation result by ?2 to obtain an IDCT operation result.

Abstract: A decoding method for unary/kth order exponential Golomb (UEGk) codes is provided. The first step is a receiving step: receiving N bits from an input stream and updating a bit count. If the N bits are all one, the receiving step is re-performed. If the N bits includes zero, a searching step is performed to find a first value based on the bit count. Subsequently, according to the bit count and a threshold value, a remaining bit number M is calculated. A second value is generated based on M remaining bits received from the input stream. Then, the first value and the second value are added, so as to generate an index.

Abstract: A video codec method is provided, for processing video data processed by a Discrete Cosine Transformation (DCT) operation, comprising: (a) if a transformation matrix having a plurality of coefficients comprises at least one non-integer coefficient among the coefficients, multiplying the transformation matrix by a multiplication factor ? to make all coefficients of the transformation matrix integers, (b) estimating a compensation set, (c) performing a Column in Row out IDCT two-dimensional operation on the video data according to the transformation matrix and the compensation set, to obtain a compensated two-dimension operation result, (d) selectively dividing the compensated two-dimension operation result by ?2 to obtain an IDCT operation result.

Abstract: A servo control device couples with an optical pickup head, which outputs a TEZC (tracking error zero crossing) signal. The servo control device includes a detection module, a signal generation module, and a selection module. In this case, the detection module detects emboss areas in an optical disk to output an emboss indication signal. The signal generation module generates a pseudo signal in accordance with the moving speed of the optical pickup head and the TEZC signal. The selection module generates a modified TEZC signal in accordance with the emboss indication signal, the pseudo signal and the TEZC signal. An optical disk drive including the servo control device and a servo control method thereof are also provided.

Abstract: A servo control device couples with an optical pickup head, which outputs a TEZC (tracking error zero crossing) signal. The servo control device includes a detection module, a signal generation module, and a selection module. In this case, the detection module detects emboss areas in an optical disk to output an emboss indication signal. The signal generation module generates a pseudo signal in accordance with the moving speed of the optical pickup head and the TEZC signal. The selection module generates a modified TEZC signal in accordance with the emboss indication signal, the pseudo signal and the TEZC signal. An optical disk drive including the servo control device and a servo control method thereof are also provided.