Invalidity dossier
US 5623424
Rate-controlled digital video editing method and system which controls bit allocation of a video encoder by varying quantization levels
Current assignee: Toshiba Corp
Added 9/23/2026, 10:47:23 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
US5623424A — Patent Overview
Title: "Rate-controlled digital video editing method and system which controls bit allocation of a video encoder by varying quantization levels"
Patent number: US5623424A
Application number: US08/466,766
Priority date: 1995-05-08
Filing date: 1995-06-06
Publication (grant) date: 1997-04-22
Legal status: Expired – Fee Related (anticipated expiration 2015-05-08)
Inventors: Faramarz Azadegan; Tomoo Yamakage; Shin-ichiro Koto; Hiroaki Unno; Hideki Mimura; Tetsuya Kitamura; Christopher J. Cookson; Greg B. Thagard; Andrew D. Rosen
Original assignees: Toshiba Corp.; Time Warner Entertainment Co. LP
Current assignees (per listing): Toshiba Corp.; Warner Bros Entertainment Inc.; Warner Communications LLC
Purpose (from title and prior-art keywords): The patent addresses rate-controlled digital video editing. Its stated subject matter concerns controlling bit allocation of a video encoder by varying quantization levels. The prior-art keywords are "macroblocks," "video," "encoded," "bits," and "information," indicating the disclosure operates at the level of encoded video macroblocks and available bit budget.
Plain-language scope: According to the supplied excerpt, the invention relates to a method and system for editing digital video while regulating the encoded output rate. Rather than fixing quantization, the encoder's bit allocation is adjusted by varying quantization levels—presumably to hit target bit rates during editing. The excerpt does not provide claim text, so the precise scope is not established here.
Related filings noted: Priority links to CA2192669C, EP0781434A4, WO1996035998A1, KR100288130B1, JP3512812B2, and AU696159B2 (1996-04-19).
Source: https://patents.google.com/patent/[US5623424](/patent/US5623424)/en
What this excerpt does not establish: It contains no claims, no detailed description, no drawings content, and no cited references. It does not establish the specific steps, components, or limits of the invention, nor the meaning of "editing" in context. Classification details were truncated. Assignee listings are stated by the source as potentially inaccurate. No litigation, validity, or ownership-transfer analysis is provided, and none is made here.
Generated 10/1/2026, 9:33:10 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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