Patent US4728441A successfully refreshed from Google Patents.
Patent EP0597576A2 successfully refreshed from Google Patents.
EP0597576A2
Expired / Lapsed
EP
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Data transmission apparatus
Assignee: Sony Corp
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Filing: 1993-09-01
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Granted: —
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Expires: 2013-09-01
Abstract
Abstract An ADRC encoder generates, regarding an ADRC block of 4x4 pixels, DR, MIN and quantized data corresponding to each pixel. A macro block formatting circuit generates code data DR, MIN and DT of four ADRC blocks. An adding circuit generates sum data (DR =DR1 + DR2 + DR3 + DR4, same calculation regarding MIN) of important data in the macro block. Mixing circuits insert the sum data into recording data as additional data. The sum data and the important data are distributed and recorded in plural channels. If one of the important data has an error and the remaining important data and the sum data have no error, the important data with the error can be completely corrected. Error correction of the important data and the quantized data generated by block encoding is effected with restrained increase in redundancy. Input data which has been reproduced and DCT-decoded is supplied to and is converted into 3x3 block format by a 3-line memory and block formatting circuit . An ADRC encoding circuit generates encoded data DTx of a center pixel data and data DT which is made up of peripheral 8 pixel data. A timing aligning circuit generates class information comprising 8 pixel data and the class information is supplied to a memory as a read address. Memory stores existing-range data and predicted data DTx^ through in-advance training. An error is detected by comparing the existing-range data and reproduced data DTx and when there is an error, predicted data DTx is selected. Error correction of received or reproduced image data is effected without using an error correction code.
Inventors
- 👤 Tetsujiro C/O Intellectual Property Div. Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:39
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N19/00; H04N19/60; H04N19/85; H04N19/89; H04N19/90; H04N19/98; H04N21/40; H04N21/43; H04N21/434; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N7/00; H04N7/24; H04N7/52; H04N7/54; H04N5/9264; H04N5/93; H04N5/94; H04N5/945
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes important data which has high importance for decoding purpose, said transmission apparatus being characterized in that: a sum data of said plural important data is formed; said sum data is transmitted in time and space different from that of said plural important data; and said plural important data are restored from received said sum data and received said plural important data.
Claim 2
Dependent Claim
130 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes important data which has high importance for decoding purpose and wherein said block code data is transmitted in plural channels, said transmission apparatus being characterized in that: a sum data is formed by operating a plurality of said important data fewer than the number of said channels; said sum data is transmitted in a channel other than channels for transmission of said important data constituting said sum data; and said plural important data are restored from received said sum data and received said plural important data.
Claim 3
Dependent Claim
108 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes important data which has high importance for decoding purpose, said transmission apparatus being characterized in that: a weighted average data is formed for said plural important data; said weighted average data is transmitted in time and space different from that of said plural important data; and said plural important data are restored from received said weighted average data and received said plural important data.
Claim 4
Dependent Claim
126 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes important data which has high importance for decoding purpose, said transmission apparatus being characterized in that: a sum data is formed for a unit of said plural important data by operating said plural important data in that unit and at least one important data in another unit; said sum data is transmitted in time and space different from that of said plural important data; and said plural important data are restored from received said sum data and received said plural important data.
Claim 5
Dependent Claim
136 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes important data which has high importance for decoding purpose, said transmission apparatus being characterized in that: a sum data is formed for a unit of said plural important data by operating said plural important data in that unit and at least one important data in another unit, wherein a type of said plural important data changes regularly; said sum data is transmitted in time and space different from that of said plural important data; and said plural important data are restored from received said sum data and received said plural important data.
Claim 6
Dependent Claim
157 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes plural data, said transmission apparatus being characterized in that: a sum data of said plural data is formed; said sum data is transmitted in time and space different from that of said plural data; when one of received said sum data and received said plural data has an error, the data having an error is restored from said sum data and the remaining plural data having no error; when a plurality of received said data have errors, an interpolated data is formed by interpolating the data having an error in space or in time; and the errors of said received plural data are corrected based upon said interpolated data and said sum data.
Claim 7
Dependent Claim
107 words
A data transmission apparatus for transmitting block code data generated by block encoding in which a block of plural pixels proximate in space is encoded as a unit of encoding to compress a data amount for the transmission, wherein said block code data includes plural data, said transmission apparatus being characterized in that: a sum data is formed by adding bit data from MSB to a predetermined bit position with respect to said plural data; said sum data is transmitted in time and space different from that of said plural data; and said plural data are restored from received said sum data and received said plural data.
Claim 8
Dependent Claim
129 words
A data transmission apparatus for transmitting digital video signals, having error detecting means for detecting errors of received or reproduced digital video signals, said error detecting means comprising: clustering means for clustering based upon plural pixel signals proximate in space or in time to a pixel to be detected; memory means for storing existing-range data which has been provided in advance by training for each class; reading means for reading out said existing-range data for a class corresponding to an address data which is defined by an output of said clustering means; and comparing means for comparing an output of said reading means and pixel data of the pixel to be detected, whereby whether an error exist or not is detected based upon an output of said comparing means.
Claim 9
Dependent Claim
58 words
A data transmission apparatus according to claim 8, wherein said memory means further stores information regarding representative data for each class, and wherein the pixel data to be detected is substituted with representative data formed based upon the information regarding representative data when the existence of an error is detected based upon the output of said comparing means.
Claim 10
Dependent Claim
53 words
A data transmission apparatus according to claim 8, wherein the reproduced or received digital video signals are encoded video signals, said apparatus further comprising decoding means for decoding the encoded video signals, and said clustering means clustering based upon decoded outputs of plural pixel data proximate to the pixel data to be detected.
Claim 11
Dependent Claim
24 words
A data transmission apparatus according to claim 8, wherein the encoded video signals are made by variable-length encoding a coefficient data obtained by DCT.
Claim 12
Dependent Claim
54 words
A data transmission apparatus according to claim 8, wherein said clustering means comprises ADRC encoding means and is supplied with the pixel data to be detected and the plural pixel data proximate thereto, and wherein among the encoded data the encoded data corresponding to the plural pixel data are used as a class information.
Claim 13
Dependent Claim
25 words
A data transmission apparatus according to claim 8, wherein the existing-range defining data is the maximum and minimum of actual data detected for each class.
Claim 14
Dependent Claim
24 words
A data transmission apparatus according to claim 8, wherein the information regarding representative data is an average of actual data detected for each class.
Claim 15
Dependent Claim
31 words
A data transmission apparatus according to claim 8, wherein the existing-range defining data is a coefficient data which is operated with the plural proximate pixel data, and an error allowance information.
Claim 16
Dependent Claim
46 words
A data transmission apparatus according to claim 9, wherein the information regarding representative data is a coefficient data which is operated with the plural proximate pixel data and wherein the representative data results from the operation of the coefficient data and the plural proximate pixel data.
Claim 17
Dependent Claim
42 words
A data transmission apparatus according to claim 15, further comprising counter means for counting the number of pixels having detected errors in a certain period and wherein the error allowance information can vary in accordance with an output of said counter means.
References Cited (Backward Citations)
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