EP0805600A2
Expired / Lapsed
EP
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Compressed video text overlay
Assignee: Nokia of America Corp
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Filing: 1997-04-22
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Granted: —
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Expires: 2017-04-22
Abstract
Abstract Novel techniques for overlaying a message onto a video image in the compressed domain. The video image is represented as a compressed, digitized video bit stream. The message is digitized and compressed to form a coded message. The coded message is combined with the compressed, digitized video bit stream to generate an output video bit stream representing the video image with a message overlay. The message may consist of text, alphanumeric characters, numbers, status indicators, symbols, and/or icons.
Inventors
- 👤 John Charles Mitchell
- 👤 Li Yan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:05
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/23614; H04N19/00; H04N19/48; H04N19/90; H04N21/40; H04N21/43; H04N21/431; H04N21/4312; H04N21/434; H04N21/4348; H04N7/00; H04N7/14; H04N7/15; H04N7/152
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A method for overlaying a message onto a video image in the compressed domain, comprising the following steps: (a) representing a video image as a compressed, digitized video bit stream; (b) generating a representation of a video message in digitized form to provide a digitized video message; (c) compressing the digitized video message to form a coded video message; and (d) combining the coded video message with the compressed, digitized video bit stream to generate an output video bit stream representing the video image with a message overlay including the video message.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the video message includes representations of text, alphanumeric characters, numbers, status indicators, symbols, and/or icons.
Claim 3
Dependent Claim
108 words
Apparatus for overlaying a video message onto a video image in the compressed domain comprising: (a) a video processing device for representing a video image as a compressed, digitized video bit stream; (b) a message generation device for generating a representation of a video message in digitized form to provide a digitized video message; (c) a video compression device for compressing the digitized video message to form a coded video message; and (d) a mixing device for combining the coded video message with the compressed, digitized video bit stream to generate an output video bit stream representing the video image with a message overlay including the video message.
Claim 4
Dependent Claim
21 words
The apparatus of claim 3 wherein the video message includes representations of text, alphanumeric characters, numbers, status indicators, symbols, and/or icons.
References Cited (Backward Citations)
No citation records indexed.
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