Hyundai Electronics Industries Co. Ltd.

Hyundai Electronics

Jin H Lee

Kyoung Bong Koo

Beom Seok Kim

Joo Hee Moon

Beom Soo Kim

Jae-won Chung

Sung Moon Chun

Jae Kyoon Kim

Sang Moo Lee

Cheol S Kang

Gwang Hoon Park

An object-based coding apparatus and method for image signals, wherein upon scanning shape-adaptive transform coefficients of an input image signal transformed in accordance with a shape-adaptive transform, only segments containing such shape-adaptive transform coefficients are scanned. In the scanning operation, segments containing no transform coefficient are skipped, thereby reducing the quantity of data being encoded. An apparatus for and a method of object-based decoding of image signals are also disclosed which can decode bit streams generated using the coding method, thereby reproducing image signals.

Object-based coding and decoding apparatuses and methods for image signals

A method for forming a poly metal gate, comprising the steps of: providing a substrate where a gate oxide is formed; forming a polysilicon film, a barrier metal, a refractory metal film and a hard mask over the gate oxide; patterning the hard mask, the refractory metal film, the barrier metal and the polysilicon film to form a gate metal gate; forming a capping layer for oxidation prevention over the gate oxide to cover the poly metal gate; etching the capping layer for oxidation prevention to remain in sidewalls of the poly metal gate; carrying out a heat treatment using a H2 gas to cover a damage of the capping layer for oxidation prevention in the capping layer etching step; and carrying out a reoxidation process to recover a damage caused in the etching step for the formation of the poly metal gate and improve reliability of the gate oxide.

Method for forming poly metal gate

A method of forming a gate electrode in a semiconductor device which can easily perform gate re-oxidation process without transforming the morphology of the gate electrode, is disclosed. According to the present invention, a gate oxide layer, a doped polysilicon layer, a barrier metal layer and a refractory metal layer are formed on a semiconductor substrate, in sequence. A hard mask is then formed on the refractory metal. Next, the refractory metal layer, the barrier metal layer and the polysilicon layer are etched using the hard mask as an etch mask to form a gate electrode. A spacer for oxidation barrier is then formed on the side wall of the gate electrode and the hard mask. Thereafter, gate re-oxidation process is performed using the spacer as an oxidation mask to form a re-oxidation layer on the substrate of both sides of the spacer. The spacer is formed of a nitride layer such as a SiON layer or a Si,N,layer. Furthermore, the spacer is formed to the thickness of 50 to 300 &angst;.

Method of forming gate electrode in semiconductor device

A method of extracting a color difference signal, a motion vector and motion compensator in HDTV, wherein motion vectors are multiplexed to one serial motion vector in a 4 step parallel process when compressing data, and in a motion compensation device for a memory address controller of HDTV, the first and second multiplexers are connected to data bus for horizontal address between a Raster format write and a memory of the address controller, and the third multiplexer is connected to a data bus for vertical address, and above the first to the third multiplexers selects addresses of color difference vertical/horizontal motion vector generator and luminance vertical/horizontal motion vector generator, and a motion compensator is structured to control motion compensation of the memory, and the output pixel from the memory is selected in the motion compensator by the motion pixel selector; motion vector, which is processed in 4 step parallel, is multiplexed to one serial motion vector, and the circuit is simply structured by using a motion compensation controller, exchanging serial the luminance motion vector into a color difference signal motion vector, and it is easy to compensate motion difference in HDTV since a motion vector of color difference is used for selecting the motion pixel and compensation motion difference.

Method of extracting color difference signal motion vector and a motion

Concerning raster converter circuit on HDTV, this invention is used to store datas to frame memory when datas converted into block unit on digital HDTV shall be displayed and also used as address generator in order to convert data format into raster scan method through frame memory when, by using blocktransform including DCT, VQ etc., data format with raster scan method from camera shall be displayed on screen with making up data by block unit which is convenient to condense data through frame memory, and can be applicable for all systems using blocktransform of DCT, VQ etc., i.e. HDTV, ATV, MPEG, JPEG & Videophone etc.

Raster format converter circuit

A memory address and display control apparatus for an high definition television comprising a memory address controller for controlling memory read/write addresses in response to a motion vector and a control signal, the memory address controller having a display read control circuit, a motion compensation read control circuit, and a raster format write control circuit, a memory unit having a previous frame memory for storing a video signal of a previous frame and a present frame memory for storing a video signal of a present frame, a multiplexing circuit for 2 to 1-multiplexing the output addresses from the memory address controller to alternately address the previous frame memory and the present frame memory in the memory unit, an input/output controller for controlling data input/output of the memory unit in response to frame and invert frame signals, a display controller for receiving video data from the memory unit under the control of the input/output controller and displaying the received video data, and a motion compensation circuit for receiving previous frame video data from the memory unit under the control of the input/output controller and adding a DCT coefficient to the received previous frame video data to transform the received previous frame video data into present frame video data.

Memory address and display control apparatus for high definition

The present invention provides a circuit of eliminating motional vector remaining caused by transmission error, comprising : an input terminal for inputting an interframe motional vector; first delay device 42 connected to the input terminal, for delaying the interframe motional vector as much as a predetermined time; a zero detector 43 connected to the input terminal and to the first delay device 42, for detecting that both the delayed interframe motional vector and the interframe motional vector are continuously in zero state more than a predetermined number; and a switch 47 connected to the zero detector, for forcibly outputting zero('0') just in case that the zero detector detects zero more than the predetermined number.

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Kyungki-do, South Korea

Jin H Lee