Method for transmitting digital audio and video information

• US 7,952,823 B2
• Filed: 10/29/2007
• Issued: 05/31/2011
• Est. Priority Date: 07/06/1990
• Status: Expired due to Fees

• Current Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Inventors: Hosokawa, Kyoichi, Watatani, Yoshizumi, Shibata, Akira, Nishimura, Keizo, Arai, Hideo, Owashi, Hitoaki
• Primary Examiner(s): Dinh; Tan X
• Application Number:
  US11/926,647
• Publication Number:
  US 20080069538A1
• Time in Patent Office: 1,310 Days
• Field of Search: 360/8, 360/27, 360/28, 360/29, 360/32, 360/39, 386/125, 386/126
• US Class Current: 360/8
• 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 method for digital information including at least one of digital video information and digital audio information to a transmission path. The method includes compressing the digital video information by a first compression method, bit compressing the digital audio information by a second compression method which is different from the first compression method, and adding error-detection information to both the digital video information and the digital audio information.

Claims

1. A digital information transmitting method for transmitting digital information, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and by compressing the audio information by a second compression method which is different from the first compression method;

coding the compressed digital information by at least adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, to enable correction for an error which occurs in a transmission path having no recording process of the digital information therein;

modulating the compressed digital information including the compressed video information and the compressed audio information to which the transmission error correction information has been added; and

transmitting the modulated digital information to the transmission path.

5. A digital information transmitting method, according to claim 1,

wherein the coding step includes inner coding and outer coding;

and

wherein the transmission error correction information is added to at least the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added.

2. A digital information transmitting method for transmitting digital information, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and by compressing the audio information by a second compression method which is different from the first compression method;

generating control information for controlling the video information and the audio information;

coding the compressed digital information by at least adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, and the control information to enable correction for an error occurring in a transmission path recording process of the digital information therein;

modulating the compressed digital information including the compressed video information and the compressed audio information and the control information to which the transmission correction information has been added; and

transmitting the modulated digital information to the transmission path.

6. A digital information transmitting method, according to claim 2,

wherein the coding step includes inner coding and outer coding;

and

wherein the transmission error correction information is added to at least the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added.

3. A digital information transmitting, receiving and recording method, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and by compressing the audio information by a second compression method which is different from the first compression method;

coding the compressed digital information by at least adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, to enable correction for an error which occurs in a transmission path having no recording/reproducing process of the digital information therein;

modulating the compressed digital information including the compressed video information and the compressed audio information to which the transmission error correction information has been added;

transmitting the modulated compressed digital information to the transmission path;

receiving the transmitted modulated compressed digital information from the transmission path;

demodulating the received compressed digital information which includes the compressed video information and the compressed audio information;

error correcting an error of the demodulated compressed digital information, the error being the error which occurs in the transmission path and not in the recording/reproducing process of the digital information;

adding record error correction information to the demodulated compressed and transmission error corrected digital information to enable correction for an error which occurs in the recording/reproducing process of the digital information;

modulating the compressed digital information including the compressed video information and the compressed audio information to which the record error correction information has been added; and

recording the modulated compressed digital information having the second error correction information to a recording media.

7. A digital information transmitting, receiving and recording method, according to claim 3,

wherein the coding step includes inner coding and outer coding;

and

wherein the transmission error correction information is added to at least the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added.

4. A digital information transmitting, receiving and recording/reproducing method, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and compressing the audio information by a second compression method which is different from the first compression method;

coding the compressed digital information by at least adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, to enable correction for an error which occurs in a transmission path having no recording/reproducing process of the digital information therein;

modulating the compressed digital information including the compressed video information and the compressed audio information to which the transmission error correction information has been added;

transmitting the modulated compressed digital information to the transmission path;

receiving the transmitted modulated compressed digital information from the transmission path;

demodulating the received compressed digital information which includes the compressed video information and the compressed audio information;

error correcting an error of the demodulated compressed digital information, the error being the error which occurs in the transmission path and not in the recording/reproducing process of the digital information;

adding record error correction information to the demodulated compressed and transmission error corrected digital information to enable correction for an error which occurs in the recording/reproducing process of the digital information;

modulating the compressed digital information including the compressed video information and the compressed audio information to which the record error correction information has been added;

recording the modulated compressed digital information having the record error correction information to a recording media;

demodulating the compressed digital information reproduced from the recording media;

record error correcting an error of the demodulated compressed digital information based on the record error correction information, the error being the error which occurs in the recording/reproducing process of the digital information; and

expanding the demodulated record error corrected compressed digital information to obtain expanded video information by expanding the digital information in accordance with a first expansion method corresponding to the first compression method and to obtain expanded audio information by expanding the digital information in accordance with a second expansion method corresponding to the second compression method.

8. A digital information transmitting, receiving and recording/reproducing method, according to claim 4,

wherein the coding step includes inner coding and outer coding;

and

wherein the transmission error correction information is added at least to the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added.

9. A digital information transmitting method for transmitting digital information, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and by compressing the audio information by a second compression method which is different from the first compression method;

coding the compressed digital information by adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, to enable correction for an error which occurs in a transmission path having no recording process of the digital information, wherein the coding step includes inner coding and outer coding, the transmission error correction information is added to at least the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added;

modulating the coded compressed digital information; and

transmitting the modulated digital information to the transmission path.

10. A digital information transmitting method for transmitting digital information, wherein the digital information includes video information and audio information, comprising the steps of:

compressing the digital information by compressing the video information by a first compression method and by compressing the audio information by a second compression method which is different from the first compression method;

coding the compressed digital information by adding transmission error correction information to the compressed video information and separately to the compressed audio information, respectively, to enable correction for an error which occurs in a transmission path having no recording process of the digital information therein, wherein the coding step includes inner coding and outer coding the transmission error correction information is added to at least the compressed video information by the outer coding, and the inner coding includes at least inner coding of the compressed video information to which the transmission error correction information has been added;

modulating the coded compressed digital information; and

transmitting the modulated digital information to the transmission path;

receiving the transmitted modulated compressed digital information from the transmission path;

demodulating the received compressed digital information which includes the compressed video information and the compressed audio information;

error correcting an error of the demodulated compressed digital information, the error being the error which occurs in the transmission path having no recording process of the digital information therein;

expanding the error corrected demodulated compressed digital information to obtain expanded video information by expanding the digital information in accordance with a first expansion method corresponding to the first compression method and to obtain expanded audio information by expanding the digital information in accordance with a second expansion method corresponding to the second compression method.