Novatek Microelectronics Corp.

Chao-Tsung Huang

Yu-Wei Chang

Po-Chih Tseng

Yi-Chang Chen

Ying-Hung Lu

Yen-Ju Huang

Tze-Sing Huang

Chia-Ping Lin

The exemplary embodiments of the present invention are direct to a method for generating a resampling reference picture and an apparatus and video decoding system using this method. The video image decoding system is used to decode a bit stream, so as to obtain a current frame. The method for generating a resampling reference picture includes following steps: (a) looking ahead specific information of next x frames of the current frame in the bit stream; (b) determining whether to generate a resampling reference picture according to the specific information of the next x frames.

Apparatus for reference picture resampling generation and method thereof and video decoding system using the same

An intra prediction mode selecting method is disclosed. First, a compress profile and a frame resolution of a frame data are received. Next, a plurality of corresponding prediction modes are selected according to the compress profile and the frame resolution, and the selected prediction modes are scheduled for sequentially calculating a plurality of corresponding cost functions. Finally, the cost functions are compared to select one of the prediction modes to serve as a prediction mode of the frame data.

Intra prediction mode selecting apparatus and method thereof

An adaptive canonical Huffman decoder including a symbol index generator, a content selector, and a symbol table buffer circuit is illustrated. The content selector outputs a content selection signal. The symbol table buffer circuit reads a corresponding symbol table from a plurality of symbol tables stored in an external memory according to the content selection signal and stores the corresponding symbol table. The symbol index generator stores decoding information of a plurality of encoding tables and selects a corresponding decoding information among all the decoding information according to the content selection signal. Then, the symbol index generator receives a bit stream and decodes the bit stream according to the corresponding decoding information to obtain a symbol index. After that, the symbol table buffer circuit obtains an output symbol from the corresponding symbol table according to the symbol index.

Adaptive canonical Huffman decoder and method thereof and video decoder

A bit rate control circuit for image compression includes a compression unit, a R-value calculation unit, a linear quantization factor (LQF) calculation unit. The compression unit is used to performs a first quantization process on an image based on a default LQF (LQF) to obtain an initial bits per pixel (bbp) with an initial number of zero coefficients (R). The R-value calculation unit calculates out a target R value (R) based on the initial bits per pixel (bbp), the initial number zero coefficients (R), and a target bpp (bbp). The LQF calculation unit calculates a target LQF (LQF) based on the target R value R. The LQFcan be used to perform a second compression on the image to obtain a compressed image corresponding to the target bpp (bpp).

Bit rate control circuit and method for image compression

A hardware implementation method for concurrently realizing overlap filter and core transform and an operation method thereof are provided. The overlap filter and core transform can be adjusted according to different specifications, processes, and operation frequencies. The hardware implementation method and the operation method thereof adopt a transform-level hardware sharing architecture and multi-port input/output register array, thereby efficiently realizing overlap filter and core transform.

Operation method and apparatus for performing overlap filter and core transform

A method and an apparatus for generating a coded block pattern for highpass coefficients are provided. The method includes receiving a quantized highpass coefficient (HP), wherein the HP includes a macroblock data; dividing the macroblock into a plurality of blocks; performing lapped transform (LT) operations of two stages on the said block data, concurrently calculating a plurality of coded block patterns of the blocks corresponding to all possible HP prediction directions; performing a calculation to obtain selection information of the HP prediction directions according to lowpass coefficients (LPs) generated through LT operations of the two stages; selecting a corresponding coded block pattern among the said coded block patterns according to the above-mentioned selection information of the HP prediction directions and outputting the selected coded block pattern.

Method and apparatus for generating coded block pattern for highpass coefficients

A method and an apparatus for cost calculation in decimal motion estimation are provided. The method comprises the following steps. Firstly, perform interpolation on a current block to get an interpolation result of a position corresponding to a decimal motion vector. Secondly, calculate a cost according to data at integer point positions of a reference frame corresponding to the current block and the decimal motion vector, and according to the interpolation result.

Method and apparatus for cost calculation in decimal motion estimation

A method for motion estimation and the apparatus thereof are provided. The method for motion estimation uses multi-resolution hierarchial search and allows splitting the optimal block mode at the level of the lowest resolution. The method also allows further splitting of blocks during local refinement at levels of higher resolutions.

Method and apparatus for motion estimation

An apparatus for motion estimation which supports multiple video compression standards and the method thereof is provided. The apparatus uses an interpolation filter with fixed coefficients. The apparatus also adjusts block sizes and calculation details of cost functions according to various video compression standards. Therefore the apparatus is capable of supporting multiple standards and providing high-quality video compression.

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Kaohsiung, Taiwan

Chao-Tsung Huang