Method and apparatus for pcm recording and reproducing audio signal
CA 1298403 C · Owner: Takahashi, Hiroaki · Inventors: Arai, Takao; Takahashi, Hiroaki; Amada, Nobutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PCM audio signal recording and reproducing apparatus samples an audio signal accompanying with a video signal, converts it to a PCM signal, adds an error detection/correction data to a predetermined number of PCM data forms a data frame by those signals, modulates it in accordance with a predetermined modulation system and, records the audio signal together with the video signal or singly on a record medium by using a rotary head type scanner. A digital signal processing circuit having a memory of a predetermined capacity is provided and the, number of digital data to be recorded in one data frame is varied in accordance with a difference between the number of input data of the digital …
Read the whole patent
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
- Granted March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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.