Patent US2886875A successfully refreshed from Google Patents.
Patent EP0558852A2 successfully refreshed from Google Patents.
EP0558852A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An apparatus for recording and reproducing a digital audio signal
Assignee: Pioneer Video Corp
•
Filing: 1992-10-19
•
Granted: —
•
Expires: 2012-10-19
Abstract
Abstract A digital audio signal recording and reproducing system employs a recording method which can function for a reproducing apparatus of a low price satisfying the performance of the conventional standard and also an expensive reproducing apparatus of a high sound quality which satisfy the standard of the Super CD featuring a wide band, a high sound quality, and multi channels. The recording apparatus divides recording audio signals into a plurality of frequency components and produces data for recording, respectively. Further, the recording apparatus adds identification data indicative of a frequency band of each of the data and records the resultant data. The reproducing apparatus selectively extracts each of the above data by means the identification data and performs the reproduction of the extracted data.
Inventors
- 👤 Naoto Itoh
- 👤 Yoshihisa Nagai
- 👤 Satoru Nomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:35
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1217; G11B20/1251; G11B20/10527; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B2020/10537; G11B2020/10592; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A recording medium for recording digital audio signals divided into blocks, said recording medium carries each of said blocks which comprises: an information data section consisting of a plurality of subblocks; and a header section which is arranged at a position preceding said information data section, including a plurality of identification data blocks corresponding to said respective subblocks, wherein said identification data block indicates at least frequency band of the digital audio information in said subblock.
Claim 2
Dependent Claim
134 words
A digital audio signal recording apparatus for recording digital audio signals on a recording medium, comprising: converting means for converting input digital audio signals into a group of band digital data for each frequency band; subblock producing means for dividing each of said band digital data groups along a time base, thereby obtaining band subblocks; information data section producing means for combining band subblocks existing in a same time zone among said band subblocks, thereby obtaining an information data section; header section producing means for producing a header section including identification data blocks indicative of frequency band of each subblock included in said information data section; block producing means for combining said information data section and said header section, thereby producing a block; and recording means for recording said block on said recording medium.
Claim 3
Dependent Claim
148 words
A digital audio signal reproducing apparatus for reproducing information from a recording medium on which digital audio signals are recorded after divided into blocks each of which is constituted by an information data section consisting of a plurality of subblocks and a header section which is arranged at a position preceding said information data section and includes a plurality of identification data blocks indicative of at least frequency bands corresponding to respective subblocks, said reproducing apparatus comprising: reading means for reading a digital signal from said recording medium; and extracting means for obtaining identification data in said header section for each block from said digital signal which is generated from said reading means and for extracting the digital audio signals on a subblock unit basis in accordance with said identification data when said identification data is equal to predetermined identification data, thereby obtaining a reproduction digital audio signal.
Claim 4
Dependent Claim
175 words
A digital audio signal reproducing apparatus for reproducing information of a recording medium on which digital audio signals are recorded after divided into blocks each of which is constituted by an information data section consisting of a plurality of subblocks and a header section which is arranged at a position preceding said information data section and which includes a plurality of identification data blocks indicative of at least frequency bands corresponding to respective subblocks, said reproducing apparatus comprising: reading means for reading a digital signal from said recording medium; extracting means for obtaining identification data in said header section for each block from said digital signal which is generated by said reading means and for extracting the digital audio signals on a subblock unit basis in accordance with said identification data when said identification data is identical with predetermined identification data; and band synthesizing means for performing a band-synthesizing operation for selected ones of said plurality of digital audio signals among digital audio signals extracted by said extracting means, thereby obtaining reproduction digital audio signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.