Digital information recording/reproducing apparatus

• US 20080069538A1
• Filed: 10/29/2007
• Published: 03/20/2008
• Est. Priority Date: 07/06/1990
• Status: Active Grant

• Current Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Inventors: Watatani, Yoshizumi, Shibata, Akira, Nishimura, Keizo, ARAI, Hideo, Hosokawa, Kyoichi, Owashi, Hitoaki
• Granted Patent: US 7,952,823 B2
• Time in Patent Office: Days
• US Class Current: 386/104
• 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

An apparatus for receiving digital information including at least one of digital video information and digital audio information The apparatus includes a receiver which receives the digital information that has digital video information bit-compressed, digital audio information bit-compressed, and error-detection information added to both the digital video information and the digital audio information, a demodulator which demodulates the received digital information, and an error detector which detects an error of digital information demodulated by the demodulator. A first expander bit-expands the video information, and a second expander which bit-expands the audio information.

Claims

1. An apparatus for receiving digital information including at least one of digital video information and digital audio information, comprising:

a receiver which receives the digital information that has digital video information bit-compressed, digital audio information bit-compressed, and error-detection information added to both the digital video information and the digital audio information;

a demodulator which demodulates the received digital information;

an error detector which detects an error of digital information demodulated by the demodulator;

a first expander which bit-expands the video information; and

a second expander which bit-expands the audio information.