Title:
VIDEO SIGNAL ENCODING DEVICE
Document Type and Number:
Japanese Patent JP3262114
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make it possible to fix the length of encoded data on a prescribed length without degrading picture quality on the decoding side by setting up the ratio of a discrete cosine transform(DCT) block of a chrominance signal to a screen as a shuffling unit and executing shuffling so that units belonging to adjacent shuffling units are mutually different.
SOLUTION: A block formation circuit 1 divides an inputted video signal into blocks in each pixel and each block is shuffled by a shuffling circuit 9 and outputted to a DCT circuit 2. The video signal encoding device is prepared for preferentially executing the encoding of picture data from the center part of the screen of a television. The DCT circuit 2 executes DCT of each block and outputs an obtained DCT coefficient. A weighting circuit 3 weights each DCT coefficient and outputs the weighted DCT coefficient. A quantization circuit 4 quantizes the DCT coefficient by the number of quantization bits determined by a controller 8 and outputs the quantized DCT coefficient to a variable length encoding circuit 5.
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Inventors:
Hidetoshi Mishima
Application Number:
JP2000015490A
Publication Date:
March 04, 2002
Filing Date:
January 17, 1992
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04N5/92; H04J3/00; H04N19/115; H04N19/124; H04N19/134; H04N19/14; H04N19/167; H04N19/176; H04N19/423; H04N19/60; H04N19/625; H04N19/85; H04N19/88; H04N19/90; H04N19/91; (IPC1-7): H04N5/92; H04N7/30
Domestic Patent References:
| JP2220270A | ||||
| JP62248393A | ||||
| JP52143712A |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)
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