Taiwan Imagingtek Corporation

Other

Chih-Ta Star Sung

Yin-Chun Blue Lan

Ing-Ruey Liaw

Eckehard Steinbach

Thomas Chang

Hu Chen

Yen Chuo

Chien-Hao Chiu

Shi-Ho Tien

Yen-Chieh Ouyang

Chih-Sheng Cheng

Mingzhe Sun

A method of frame rate conversion includes receiving multiple input frames including a previous frame, a current frame and a next frame. A changing trend between the current frame and the previous frame is calculated. The current frame is used for generating one or more than one inserting frame according to the changing trend. The inserting frame is output after outputting the current frame to achieve frame conversion.

Semiconductor display driver device, mobile multimedia apparatus and method for frame rate conversion

An image compression method and fast storage device accessing and pixel decompression is achieved by applying variable bit rate to reduce the data amount of each image frame. Several thresholds are predetermined depending on the availability of the bandwidth of the storage device and the image resolution to decide the compression ratio of each image frame. Starting address of each compressed image frame is saved in predetermined location of the storage device for quick random accessing any compressed frame of image.

Method and apparatus of temporary image frame compression

The digital video referencing frame image is compressed block by block by applying lossless compression algorithm to pixel components with full length, or 1 bit, 2 bits, 3 bits or 4 bits LSB bits truncation. If a sub-block has high complexity which results in more than 3 bits error for most pixel components, a transfer algorithm with quantization and VLC coding is applied to compress this sub-block. Should the complexity is higher than a threshold or at least one sub-block having error of more than 3 bits for most pixel components, truncating 1 LSB bit of sub-block with simple pattern to save more bits to be allocate to code the sub-block with highest complex pattern.

Method of digital video reference frame compression

Applying a mechanism of image signal processing and color-space-conversion to convert the captured Green components to be Y, luminance components for only those pixels having raw Green data without interpolation, and to convert the Blue components to be U, chrominance components for only those pixels having raw Blue data, and Red components to be V, chrominance components for only those pixels having raw Red data. These converted YUV components are input to a predetermined video compression codec for reducing the intra- and inter-frame redundant information.

Method and apparatus of Bayer pattern direct video compression

A method of compressing an image by saving the compressed color components into multiple temporary buffers with each time slot saving the color component to the different buffer. A method deciding when to shift the compressed color components to another device is applied to avoid underflow and overflow of the output buffer.

Method and apparatus of image compression with output control

The differential value of the adjacent pixels is calculated firstly and is coded by a VLC coding. The VLC coding includes codes representing the Quotient and Remainder with a marker bit inserted in between. The divider is predicted with no code in the coded data stream. If three pixel components are presented in the same clock time, three VLC encoders and three VLD decoders are applied to encode and decode one pixel at a time. During encoding, both Remainder and Quotient of the same pixel component are encoded in parallel followed. During decoding, both Remainder and Quotient of the same pixel component are decoded in parallel and the results of the first pixel component are used a reference to decode the second pixel component which adopts the same decoding procedure and the decoded results of the second pixel component is used as reference to decode the third pixel component.

Method and circuit of high performance variable length coding and decoding for image compression

The present invention provides a new semiconductor Read-Only Memory, ROM, which stores more than one bit per cell. The potential of multiple threshold voltages combined with the potential multiple ratios of device channel width and length makes an ROM cell store multiple bits feasible. An N-type or a P-type MOS device of the standard CMOS process or a flat-cell mask ROM process are operable devices and processes in the design of this multi layer cell ROM. The ROM cell with smaller size is implemented to represent the LSB bits, while the larger size ROM cell is to represent the MSB bits.

Semiconductor ROM device and manufacturing method thereof

This invention provides efficient method and apparatus of the motion estimation for the video compression. A storage device saving MVs of a partial or an entire frame and the prediction modes are applied to be the reference for the motion estimation of the neighboring frame. The majority MV of the current frame and at least one neighboring frame is referred as the MV or as the initial point of searching for the current frame or the neighboring frames. Should the movement of the blocks in previous frame is different from the FMV, will the blocks or the neighboring blocks need to go through the motion estimation. The predetermined threshold values are specified to decide the need of a refiner pixel resolution, the sub-sampling ratio, and early giving up or early selecting of the current macroblock. Sub-sampling ratio or the decision of refiner or coarser pixel resolution is determined by the values of the MV or MAD.

Motion estimation method and apparatus for video data compression

An image compression method for compressing groups of pixel data, including the following steps: MSB portions and LSB portions of the pixel data are compressed separately. Further, the LSB portions are grouped according to their associated MSB portions so that similar pixels are compressed together to gain higher a compression ratio. Some LSB portions are truncated to ensure a compression ratio. When performing compression, enhanced variable-length coding is adopted that predicts more accurate dividers by considering weighted combination of adjacent pixels. The quotient of each groups of compression portion is predicted and coded accordingly.

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Glonn, Germany

Chih-Ta Star Sung