A decoder decodes full frame MPEG-2 video by a single method that applies regardless of buffer memory and frame rate conversion considerations. A display control module handles frame rate and field sequence in response to host configuration, trick play command signals, and information in the received bitstream. Pictures are decoded as buffer memory for the decoded pictures becomes available, and picture display attributes are assigned and stored in a table, one string for each decoded picture. Frame rate and field sequence are managed in light of memory constraints, to produce a high quality result without re-decoding data.

Digital video decoding, buffering and frame-rate converting method and apparatus

A low-resolution image is displayed at high resolution and power consumption is reduced Resolution is made higher by super-resolution processing Then, display is performed with the luminance of a backlight controlled by local dimming after the super-resolution processing By controlling the luminance of the backlight, power consumption can be reduced Further, by performing the local dimming after the super-resolution processing, accurate display can be performed

Method for driving liquid crystal display device

An image coding apparatus provides a run-length encoding unit RLE 1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero coefficients and a level value Lev that indicates a value of a non-zero coefficient following the zero coefficients The run-length encoding unit RLE 1 includes a reordering unit Lreodr for reordering level values Lev; a variable length coder LVLC for coding reordered level values ROLev by using a code table that is selected according to the value of a quantization parameter QP; a reordering unit Rreodr for reordering run values Run from high frequency component of the quantized coefficients to low frequency component; and a variable length coder RVLC for coding reordered run values RORun by using a code table that is selected according to the number of already-processed run values

Variable length coding method and variable length decoding method

An image processing method for dividing a digital image signal into plural image signals corresponding to plural blocks constituting a single display screen, and performing block-by-block coding of the image signals of the respective blocks, comprises transforming an image signal of a coding target block to be subjected to coding into frequency components by frame-by-frame frequency transformation on a frame basis or field-by-field frequency transformation on a field basis; setting a processing order for coding the frequency components corresponding to the image signal of the coding target block, according as the image signal of the coding target block has been subjected to the frame-by-frame frequency transformation or the field-by-field frequency transformation; and successively coding the frequency components corresponding to the image signal of the coding target block according to the order which has been set. Therefore, in coding of an interlaced image or a specific progressive image in which frame DCT blocks and field DCT blocks coexist, a run length is increased, thereby improving coding efficiency.

Image processing method, image processing apparatus and data recording medium

A video decoder, encoder, and corresponding methods for processing video signal data for an image block and a particular reference picture index to predict the image block are disclosed that utilize adaptive weighting of reference pictures to enhance video compression, where a decoder includes a reference picture weighting factor unit for determining a weighting factor corresponding to the particular reference picture index; an encoder includes a reference picture weighting factor assignor for assigning a weighting factor corresponding to the particular reference picture index; and a method for decoding includes receiving a reference picture index with the data that corresponds to the image block, determining a weighting factor for each received reference picture index, retrieving a reference picture for each index, motion compensating the retrieved reference picture, and multiplying the motion compensated reference picture by the corresponding weighting factor to form a weighted motion compensated reference picture.

Adaptive weighting of reference pictures in video encoding

Device and method for converting a frame rate, is disclosed, in which a motion compensated frame is newly produced in converting a frame rate, particularly, in a digital TV of a PAL or NTSC system, a motion component compensated separate frame is provided between frames and displayed to horizontal/vertical synchronizing signals two times faster than an original frequency for eliminating flicker, and in a case when a video signal of a film rate is converted into a video signal of a frame rate of PAL or NTSC system, motion component compensated new frames are produced for converting the frame rate for preventing blurring occurred in motion portions. And, by differently compensating motion components of N frames inserted between two frames and processing the frames in real time, a slow motion can be displayed smoothly without any separate memory.

Hyun Joong Shin

Papers

Device and method for converting frame rate

Vorrichtung und Verfahren zum Ändern der Vollbildfrequenz