Portable information terminal, method of processing audio data, recording medium, and program
CA 2343374 A1 · Owner: Sony Computer Entertainment Inc. · Inventors: Wakimura, Takayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An expansion processor (202) has a buffer defining unit (240) for defining one of two buffers (BUF1, BUF2) as a present inverse quantization buffer and defining one of two buffers (BUF11, BUF12) as a present restoration buffer an , inverse quantization processor (246) for inversely quantizing a quantized value read for each sample from a DCT data buffer an IDCT processor (248) for , effecting an IDCT process on the inversely quantized data to restore timedomain audio data from frequency-domain data a low-pass filter processor , (250) for removing a high-frequency component from the restored audio data and an audio data output unit (252) for outputting successive restored samples of …
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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 July 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2022.
- 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.