Unlock instant, AI-driven research and patent intelligence for your innovation.

Video decoding apparatus and method

A kind of equipment and coding technology, applied in the direction of digital video signal modification, TV, pulse modulation TV signal transmission, etc., can solve the problem of affecting memory capacity and so on

Inactive Publication Date: 2008-02-13
KK TOSHIBA
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when post-filtering is implemented by hardware, the on / off of the filter circuit does not affect the hardware size, but affects the memory capacity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Video decoding apparatus and method
  • Video decoding apparatus and method
  • Video decoding apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Hereinafter, a video decoding method and apparatus related to embodiments will be described with reference to the accompanying drawings.

[0024] According to the video decoding device shown in FIG. 1 , a bit stream in the form of MPEG-2 is supplied to a video decoder 110 through a line 101 . The video decoder 110 includes a variable length code decoder 111 connected to the line 101, a dequantizer 112 connected to the decoder 111, an inverse DCT transformer 113 connected to the output of the dequantizer 112, and a An adder 114 at the input connected to the decoder 113, and a motion compensated prediction unit 115 connected via line L3 to the output of the decoder 111 and having a frame memory. The output of the motion compensated prediction unit 115 is connected to the other input of the adder 114 . The output of a variable length code (VLC) decoder 111 is connected to a coded information analyzer 120 and a post filter 130 via a line L1. The output of adder 114 is con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A video decoding apparatus includes a decoder (111-114) to decode coded data to generate a decoded image signal, a detector (120) to detect a block including no AC component of a DCT coefficient from the coded data, an estimator (120) to estimate a degree of decrease of a given high-frequency component at the time of generation of a motion compensated prediction image, according to a block position indicated by a motion vector with precision of less than one pixel, and a post filter (130) to filter the decoded image signal by decreasing a strength of filtering to be applied to the block to suppress coding noise as the degree of decrease of the given high-frequency component increases and subject the image signal to filtering.

Description

technical field [0001] The present invention relates to a video decoding device and method thereof for decoding and reproducing data compressed by an encoding scheme such as MPEG (Moving Picture Experts Group). Background technique [0002] Due to the rapid development of video processing technology, motion video is generally processed as digital data. In recent years, digital broadcast receiving televisions or HDD (Hard Disk Drive) / DVD (Digital Versatile Disk) recorders / players mainly reproduce video images compressed in the MPEG-2 format. The MPEG compression scheme represented by MPEG-2 is an encoding scheme using motion compensated prediction (MC) and discrete cosine transform (DCT). When images are compressed at low bit rates, "block noise" at block boundaries and "ringing noise" around block edges can be perceived due to the quantization of DCT coefficients. [0003] Various methods and devices have been developed as post-filters for adaptively removing noise resulti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N7/50H04N19/50H04N19/117H04N19/136H04N19/139H04N19/176H04N19/196H04N19/44H04N19/503H04N19/523H04N19/60H04N19/61H04N19/625H04N19/86H04N19/91
CPCH04N19/00781H04N7/26335H04N19/00739H04N19/0089H04N19/00296H04N7/26377H04N7/26882H04N19/00151H04N19/00909H04N19/00533H04N7/26888H04N19/00218H04N19/00903H04N7/2625H04N7/26212H04N7/26138H04N19/00066H04N7/50H04N7/364H04N7/26058H04N19/139H04N19/159H04N19/61H04N19/117H04N19/18H04N19/44H04N19/80H04N19/523H04N19/85H04N19/86
Inventor 山口昇
Owner KK TOSHIBA