Lg Electronics Inc.

Cheol-Hong Min

Il-Taek Lim

Seong Ok Bae

Seung-Jai Min

Kyoung-Won Lim

Sang-Hee Cho

Sanghee Cho

Heesub Lee

Kyoungwon Lim

Suhwan Kim

Hee Sub Lee

Seong-Ok Bae

Seong-Jai Min

A method for storing video frame data in a memory includes the steps of: sequentially receiving the video frame data; dividing the video frame data into a first part and a second part; storing the first part in the memory; storing the second part in the memory while the stored first part is read from the memory for a certain purpose; and reading the second part stored in the memory for the certain purpose.

Method for storing video frame data in a memory

A video decoding device for a TV receiver, e.g., SDTV, decodes a compressed video signal transmitted from a transmitting side and displays the decoded signal. The device includes a first downsampling part for downsampling input data in a unit of block at a predetermined ratio; a display size converting part for dividing the downsampled result into a first group of data and a second group of data and after downsampling the first group of data, for performing screen format conversion for the downsampled first group of data into a display size; a memory for storing each of the converted first group of data and the second group of data; and an output part for downsampling the second group of data to correspond with the first group of data to thereby perform screen format conversion for the downsampled second group of data, when the second group of data is reproduced, and for outputting the first and second groups of data.

Video decoding device of a TV receiver

A method and apparatus for an adaptive quantization control is disclosed. The present invention decomposes one picture into a plurality of blocks, encodes the picture in the block unit and controls quantization by obtaining a first activity from a comparison of the activity of the current block to be encoded and that of the entire blocks; obtaining a second activity from a comparison of motions of neighboring blocks; and controlling the quantization using the first activity if the first activity is below a reference value and using the second activity if the first activity exceeds the reference value.

Adaptive quantization control method

The method and apparatus for eliminating noise in a video signal encoder according to the present invention divides an input video signal into a noise component and a pure video signal component and performs filtering gain control taking account of a rate of energy of the noise and pure signal, thereby performing the exact filtering with respect to an actual noise component and improving picture quality. The present invention also extracts a noise filtered signal component in advance, performs filtering of the remaining signal through gain control, and combines the extracted pure signal component and the filtered remaining signal, thereby eliminating the noise while keeping the resolution of the signal. If the video signal is processed in the unit of blocks, the noise filtering is performed considering this fact, thereby reducing blocking effect and improving picture quality.

Method and apparatus for eliminating noise in a video signal encoder

A decoder for a digital TV receiver is disclosed. The present decoder improves the picture quality of a video signal down converted when an SD class TV receiver receives an HD class video signal. Generally, the decoder receives data in block units, converts a format of the data into a format for display, memorizes the data, processes the memorized data, and displays the processed data by converting the format to include more horizontal color signals than vertical color signals, memorizing and reproducing the data in downsampling the data in block units in a given ratio, and storing the data.

Decoder for digital TV receiver

A method for decoding MPEG standard I (Intra-coded) and P (Predictive-coded) picture bit streams using a memory smaller than one video frame of data. The method includes the steps of receiving a video bit stream of an I picture and a video bit stream of a P picture in succession and storing the received video bit streams in a first memory, each of the I picture and the P picture having an up portion and a down portion, and each of the up and down portions having a top field and a bottom field; decoding the stored up portion of the I picture and storing the decoded up portion of the I picture in a first region of a second memory; decoding the stored down portion of the I picture and storing the decoded down portion of the I picture in a second region of the second memory; simultaneously decoding the stored up portion of the P picture and displaying the top fields of the up and down portions of the I picture stored in the first and second regions of the second memory and storing the up portion of the P picture in a third region of the second memory; and decoding the down portion of the P picture, waiting for display of the top fields of the up and down portions of the I picture and a predetermined number of scan lines of the bottom fields of the up and down portions I picture, and storing the decoded down portion of the P picture in the first region of the second memory.

Growing community of inventors

Seoul, South Korea

Cheol-Hong Min