EP0610282A1 - Process for simultaneously transmitting audio signals from n-signal sources - Google Patents
Process for simultaneously transmitting audio signals from n-signal sourcesInfo
- Publication number
- EP0610282A1 EP0610282A1 EP92921746A EP92921746A EP0610282A1 EP 0610282 A1 EP0610282 A1 EP 0610282A1 EP 92921746 A EP92921746 A EP 92921746A EP 92921746 A EP92921746 A EP 92921746A EP 0610282 A1 EP0610282 A1 EP 0610282A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmission capacity
- signals
- available
- individual
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
Definitions
- the invention relates to a method for the simultaneous transmission of signals from N signal sources via a corresponding number of transmission channels.
- each individual transmission channel is dimensioned in such a way that it can transmit the “maximum bit stream”, comparatively much transmission capacity remains “unused” on average.
- the invention is based on the object of specifying a method for the simultaneous transmission of signals from N signal sources via a corresponding number of transmission channels, with which "data-reduced signals" are transmitted via transmission channels which are only dimensioned for an "average need", without perceptible signals , ie for example, audible losses in signal capacity can be transmitted.
- the invention is based on the basic idea that, in order to compensate for the fluctuating demand for the simultaneous transmission of signals from N signal sources via a corresponding number of transmission channels, the allocation to the individual signals is not carried out according to statistical criteria, but already in the method step in which the signals for data reduction are encoded to compensate for the fluctuating demand by means of appropriate measures.
- the individual signals are divided into blocks and the blocks are converted into spectral coefficients by means of transformation or filtering.
- the blocks belonging to the individual signals are divided into sections, and the respective current sections of all signals are processed together. This is shown graphically in FIG. 1 by corresponding "function blocks".
- the permitted interference is determined for each section and the requirement for the currently required total transmission capacity is calculated from this.
- the calculation of the total transmission capacity ie the necessary number of bits, is carried out simultaneously for all blocks.
- the allocation of the maximum available transmission capacity for each individual signal is calculated from the total available transmission capacity and the currently required total transmission capacity.
- the "bit number" allocated for each individual signal is used to encode the individual signal and, accordingly, to transmit this individual signal.
- the transmission capacity required is only balanced between the channels.
- there is a reserve of transmission capacity a so-called bit reservoir, from which, in the event that the total transmission capacity required exceeds the transmission capacity available on average, an allocation of transmission capacity follows.
- This bit reservoir is always filled when the requested transmission capacity is smaller than the available transmission capacity (claim 3).
- bits are forcibly allocated to the individual channels (Claim 4).
- This compulsory allocation is preferably carried out only to the channels or signal sources that have registered a requirement that is greater than an average requirement.
- a requirement that is substantially greater than the average requirement means that these signals are much more difficult to encode than conventional signals.
- an overall block is formed from all separately coded signals of the signal sources, which consists of a fixed area, which contains information from which the separation of the signals can be determined, and of several areas of flexible length that picks up the encoded signals.
- Fig. 2a A further saving in transmission capacity is obtained by recognizing the same input signals and transmitting them only once using a suitable transmission format (claim 6). This is shown schematically in Fig. 2b.
- the audio signal y is broken down into samples (y (t) which are digitized in a manner known per se.
- the digitized samples are broken down into blocks of length 2n which, in the selected embodiment, overlap blocks with overlap n are:
- Each block of length n is transformed into spectral coefficients by a transformation, for example a Fast Fourier transformation or a cosine transformation:
- the permitted disturbance is calculated using a suitable psycho-acoustic model, with reference to which reference is made to the literature.
- the masking between the tapes results from the earth-deficient disturbance
- ss (i, b) max (s (i, b-l (/ 16, s (i, b))
- pO 345 for PCM (scale factors: 10 bits / section
- bit numbers are then assigned to the individual signals. For this purpose, it is assumed that k (k) bits are required for coding the K input signals, while the number of bits available is Psoii.
- the number of bits available for quantization in each section is increased by / z-p) / 512.
- the number of bits available for the quantization in each section is increased by (zp) / 512.
- PCM rounding bits per ATW to an integer is necessary: For this purpose, all bits / ATW are first rounded down to the next lower integer and the resulting bit total is determined.
- bit / ATW starting from the lowest bands is made available in a first pass until the available number of bits is reached.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Radar Systems Or Details Thereof (AREA)
- Time-Division Multiplex Systems (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4135977 | 1991-10-31 | ||
DE4135977A DE4135977C2 (en) | 1991-10-31 | 1991-10-31 | Method for the simultaneous transmission of signals from N signal sources |
PCT/DE1992/000905 WO1993009645A1 (en) | 1991-10-31 | 1992-10-28 | Process for simultaneously transmitting signals from n-signal sources |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0610282A1 true EP0610282A1 (en) | 1994-08-17 |
EP0610282B1 EP0610282B1 (en) | 1998-08-12 |
Family
ID=6443876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92921746A Expired - Lifetime EP0610282B1 (en) | 1991-10-31 | 1992-10-28 | Process for simultaneously transmitting audio signals from n-signal sources |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0610282B1 (en) |
JP (1) | JP3276370B2 (en) |
KR (1) | KR100268517B1 (en) |
AT (1) | ATE169791T1 (en) |
AU (1) | AU666339B2 (en) |
CA (1) | CA2122577C (en) |
DE (2) | DE4135977C2 (en) |
DK (1) | DK0610282T3 (en) |
ES (1) | ES2121868T3 (en) |
FI (1) | FI113936B (en) |
NO (1) | NO316098B1 (en) |
RU (1) | RU2108001C1 (en) |
WO (1) | WO1993009645A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5737720A (en) * | 1993-10-26 | 1998-04-07 | Sony Corporation | Low bit rate multichannel audio coding methods and apparatus using non-linear adaptive bit allocation |
JP3528260B2 (en) * | 1993-10-26 | 2004-05-17 | ソニー株式会社 | Encoding device and method, and decoding device and method |
US5687095A (en) * | 1994-11-01 | 1997-11-11 | Lucent Technologies Inc. | Video transmission rate matching for multimedia communication systems |
US5641529A (en) * | 1995-03-15 | 1997-06-24 | The Quaker Oats Company | Extrusion apparatus and method for producing three-dimensional shapes |
JP3521596B2 (en) * | 1996-01-30 | 2004-04-19 | ソニー株式会社 | Signal encoding method |
DE19727938B4 (en) * | 1997-07-01 | 2006-12-14 | Mayah Communications Gmbh | Method and device for coding signals |
KR102291633B1 (en) | 2018-10-15 | 2021-08-20 | 에코플러스 주식회사 | Mixture material composition for steam curing concrete and steam curing concrete composition comprising the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH589390A5 (en) * | 1975-08-19 | 1977-06-30 | Patelhold Patentverwertung | |
DE3440613C1 (en) * | 1984-11-07 | 1986-04-10 | Institut für Rundfunktechnik GmbH, 8000 München | Method for digital transmission of a broadcast radio programme signal |
DE3629434C2 (en) * | 1986-08-29 | 1994-07-28 | Karlheinz Dipl Ing Brandenburg | Digital coding method |
JPH0648796B2 (en) * | 1988-02-05 | 1994-06-22 | 日本電気株式会社 | Demand assign satellite communication device |
DE3817864A1 (en) * | 1988-05-26 | 1989-12-07 | Telefunken Fernseh & Rundfunk | Method for the transmission of an audio signal |
US5115309A (en) * | 1990-09-10 | 1992-05-19 | At&T Bell Laboratories | Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders |
-
1991
- 1991-10-31 DE DE4135977A patent/DE4135977C2/en not_active Expired - Lifetime
-
1992
- 1992-10-28 JP JP50808893A patent/JP3276370B2/en not_active Expired - Lifetime
- 1992-10-28 RU RU94028106A patent/RU2108001C1/en active
- 1992-10-28 DE DE59209456T patent/DE59209456D1/en not_active Expired - Lifetime
- 1992-10-28 WO PCT/DE1992/000905 patent/WO1993009645A1/en active IP Right Grant
- 1992-10-28 AT AT92921746T patent/ATE169791T1/en active
- 1992-10-28 DK DK92921746T patent/DK0610282T3/en active
- 1992-10-28 EP EP92921746A patent/EP0610282B1/en not_active Expired - Lifetime
- 1992-10-28 KR KR1019940701410A patent/KR100268517B1/en not_active IP Right Cessation
- 1992-10-28 ES ES92921746T patent/ES2121868T3/en not_active Expired - Lifetime
- 1992-10-28 AU AU28069/92A patent/AU666339B2/en not_active Expired
- 1992-10-28 CA CA002122577A patent/CA2122577C/en not_active Expired - Lifetime
-
1994
- 1994-04-29 FI FI942000A patent/FI113936B/en not_active IP Right Cessation
- 1994-04-29 NO NO19941595A patent/NO316098B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9309645A1 * |
Also Published As
Publication number | Publication date |
---|---|
NO316098B1 (en) | 2003-12-08 |
NO941595D0 (en) | 1994-04-29 |
ATE169791T1 (en) | 1998-08-15 |
JP3276370B2 (en) | 2002-04-22 |
AU666339B2 (en) | 1996-02-08 |
CA2122577C (en) | 2000-12-26 |
DE4135977A1 (en) | 1993-05-06 |
ES2121868T3 (en) | 1998-12-16 |
FI942000A (en) | 1994-04-29 |
KR100268517B1 (en) | 2000-10-16 |
AU2806992A (en) | 1993-06-07 |
DE4135977C2 (en) | 1996-07-18 |
JPH07504539A (en) | 1995-05-18 |
WO1993009645A1 (en) | 1993-05-13 |
FI113936B (en) | 2004-06-30 |
NO941595L (en) | 1994-04-29 |
CA2122577A1 (en) | 1993-05-13 |
FI942000A0 (en) | 1994-04-29 |
EP0610282B1 (en) | 1998-08-12 |
DK0610282T3 (en) | 1999-05-10 |
DE59209456D1 (en) | 1998-09-17 |
RU2108001C1 (en) | 1998-03-27 |
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