Digital information recording/reproducing apparatus

• US 20060093332A1
• Filed: 12/19/2005
• Published: 05/04/2006
• Est. Priority Date: 07/06/1990
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Inventors: Hosokawa, Kyoichi, Watatani, Yoshizumi, Shibata, Akira, Nishimura, Keizo, Arai, Hideo, Owashi, Hitoaki
• Granted Patent: US 8,009,375 B2
• Time in Patent Office: Days
• US Class Current: 386/264
• CPC Class Codes: G11B 15/00 Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function driving or guiding heads G11B3/00 - G11B7/00, G11B21/00
• CPC Class Codes: G11B 15/1808 Driving of both record carrier and head G11B15/467 takes precedence; mounting of head G11B5/52
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 15/4671 by controlling simultaneously the speed of the tape and the speed of the rotating head
• CPC Class Codes: G11B 15/4673 by controlling the speed of the tape while the head is rotating
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/18 Error detection or correction; Testing , e.g. of drop-outs
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: G11B 27/032 on tapes G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel
• CPC Class Codes: G11B 5/00839 using cyclically driven heads providing segmented tracks
• CPC Class Codes: G11B 5/0086 using cyclically driven heads providing segmented tracks
• CPC Class Codes: G11B 5/09 Digital recording
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/78263 for recording on tracks inclined relative to the direction of movement of the tape
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/926 by pulse code modulation H04N5/919 takes precedence
• CPC Class Codes: H04N 9/7921 : for more than one processing mode
• CPC Class Codes: H04N 9/7973 : by dividing the luminance or colour component signal samples or frequency bands among a plurality of recording channels H04N9/804, H04N9/825 take precedence
• CPC Class Codes: H04N 9/8042 : involving data reduction

Abstract

A digital signal receiving apparatus and method in which a receiver receives a digital signal including a video signal and an audio signal, wherein the received digital signal is bit-compressed and time-base compressed, a demodulator demodulates the received digital signal, and an expander bit-expands and time-base expands the demodulated digital signal.

Claims

1. A digital signal receiving apparatus, comprising:

a receiver which receives a digital signal including a video signal and an audio signal, wherein the received digital signal is bit-compressed and time-base compressed;

a demodulator which demodulates the received digital signal; and

an expander which bit-expands and time-base expands the demodulated digital signal.

2. A digital signal receiving apparatus, according to claim 1, further comprising a memory which memorizes the demodulated digital signal from the demodulator.

3. A digital signal receiving method comprising the steps of:

receiving a digital signal including a video signal and an audio signal, wherein the received digital signal is bit-compressed and time-base compressed;

demodulating the received digital signal; and

bit expanding and time-base expanding the demodulated digital signal.

4. A digital signal receiving apparatus, comprising;

a receiver which receives a digital signal including a video signal and an audio signal that are bit-compressed and time-base compressed, together with a parity signal which is added to the bit-compressed and time-base compressed digital signal, the parity signal enabling correction of errors which occur in a transmission path;

a demodulator which demodulates the received digital signal;

a error corrector which error corrects the demodulated digital signal based on the parity signal so as to provide an error corrected digital signal; and

an expander which bit-expands and time-base expands the error corrected digital signal.

5. A digital signal receiving apparatus, comprising;

a receiver which receives a digital signal including a video signal and an audio signal, that are bit compressed and time-based compressed, together with a parity signal which is added to the bit-compressed and time-base compressed signal;

the parity signal enabling correction of errors which occur in a transmission path; and

a memory which memorizes the bit-compressed and time-base compressed signal which is error corrected by the parity signal.