Recording and reproducing method and apparatus
CA 2043979 A1 · Owner: Aiwa Co. Ltd. · Inventors: Mogi, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of simultaneously recording and reproducing a digital audio signal and a digital video signal for a dynamic picture. A digital signal is recorded and reproduced in N bits (N: integer), and an image area an, audio area and a control area are formed by part of the N bits. Compressed digital video signals for multiple screens forming a dynamic picture are allocated in the image area in each compression reference period. A digital audio signal in each compression reference period is allocated in the audio area in the compression reference period. Data, such as compression information. which concerns a digital signal to be allocated in the image area or audio area, is allocated in the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.