Patent EP0393646A2 successfully refreshed from Google Patents.
EP0393646A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and apparatus for transmitting video data
Assignee: Sony Corp
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Filing: 1990-04-19
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Granted: —
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Expires: 2010-04-19
Abstract
Abstract According to the present invention, when video data of, for example, a real moving picture is transmitted, the video data is data-compressed (12), data-encoded (14) and transmitted (15,16) while the combination of the compressing ratio of the video data and the encoding ratio of the video data is varied in response to a condition of the transmission path. Therefore, regardless of the condition of the transmission path, video data of the best quality can be transmitted at a constant transmitting speed.
Inventors
- 👤 Yuichi Kojima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/18523; H04N; H04N7/00; H04N7/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A method of transmitting data comprising the steps of (a) compressing (12) the data; (b) convolutionally encoding (14) the compressed data; (c) transmitting (15,16) the convolutionally encoded, compressed data at a pre-determined speed; (d) receiving (21,22) the convolutionally encoded, compressed data; (e) Viterbi decoding (23) the convolutionally encoded, compressed data; and (f) expanding (24) the Viterbi decoded data, wherein the combination of the compressing ratio and the encoding ratio of the data is varied while the transmitting speed of the data is maintained constant.
Claim 2
Independent Claim
84 words
A method of transmitting data comprising the steps of (a) compressing (12) the data; (b) convolutionally encoding (14) the compressed data; (c) transmitting (15,16) the convolutionally encoded, compressed data at a pre-determined speed; (d) receiving (21,22) the convolutionally encoded, compressed data; (e) Viterbi decoding (23) the convolutionally encoded, compressed data; and (f) expanding (24) the Viterbi decoded data, wherein the combination of the compressing ratio and the encoding ratio of the data is varied while the transmitting speed of the data is maintained constant.
Claim 3
Dependent Claim
42 words
The method according to claim 1, further comprising the steps of detecting the error situation in the expanded Viterbi decoded data, and changing the combination of the compressing ratio and the encoding ratio of the data according to the detected error situation.
Claim 4
Dependent Claim
20 words
The method according to claim 1 or 2, wherein the transmitting step comprises transmitting the data via a satellite (3).
Claim 5
Independent Claim
30 words
The method according to anyone of claims 1 to 3, wherein the combination of the compressing ratio and the encoding ratio of the data is changed according to the weather.
Claim 6
Independent Claim
120 words
An apparatus for transmitting data comprising: (1) compressing means (12) for compressing data according to a selected ratio; (2) encoding means (14) for convolutionally encoding the compressed data according to a selected ratio; (3) transmitting means (15,16) for transmitting the convolutionally encoded, compressed data at a pre-determined speed; (4) receiving means (21,22) for receiving the convolutionally encoded, compressed data; (5) decoding means (23) for Viterbi decoding the convolutionally encoded, compressed data; (6) expanding means (24) for expanding the Viterbi decoded data; and (7) wherein the compressing means (12) and the encoding means (14) vary the combination of the compressing ratio and the encoding ratio of the data while the transmitting means (15;16) maintains the transmitting speed of the data constant.
Claim 7
Independent Claim
120 words
An apparatus for transmitting data comprising: (1) compressing means (12) for compressing data according to a selected ratio; (2) encoding means (14) for convolutionally encoding the compressed data according to a selected ratio; (3) transmitting means (15,16) for transmitting the convolutionally encoded, compressed data at a pre-determined speed; (4) receiving means (21,22) for receiving the convolutionally encoded, compressed data; (5) decoding means (23) for Viterbi decoding the convolutionally encoded, compressed data; (6) expanding means (24) for expanding the Viterbi decoded data; and (7) wherein the compressing means (12) and the encoding means (14) vary the combination of the compressing ratio and the encoding ratio of the data while the transmitting means (15;16) maintains the transmitting speed of the data constant.
Claim 8
Dependent Claim
50 words
The apparatus according to claim 5, further comprising means (26,27) for detecting the error situation in the expanded Viterbi decoded data and controlling the compressing means (12) and the encoding means (14) to change the combination of the compressing ratio and the encoding ratio according to the detected error situation.
Claim 9
Dependent Claim
19 words
The apparatus according to claim 5 or 6 , wherein transmitting means comprises a satellite data transmission network (15,16,3).
Claim 10
Dependent Claim
41 words
The apparatus according to claim 5, further comprising means (26,27) for controlling the compressing means (12) and the encoding means (14) to change the combination of the compressing ratio and the encoding ratio to compensate for changes in the weather situation.
References Cited (Backward Citations)
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