WO1996012384B1 - Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together - Google Patents
Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded togetherInfo
- Publication number
- WO1996012384B1 WO1996012384B1 PCT/EP1995/004008 EP9504008W WO9612384B1 WO 1996012384 B1 WO1996012384 B1 WO 1996012384B1 EP 9504008 W EP9504008 W EP 9504008W WO 9612384 B1 WO9612384 B1 WO 9612384B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- audio signals
- stereophonic audio
- signal
- fidelity
- reference signal
- Prior art date
Links
- 230000005236 sound signal Effects 0.000 title abstract 4
- 230000003595 spectral Effects 0.000 abstract 2
Abstract
In order to measure the fidelity of stereophonic audio signals, a stereophonic signal is used as reference signal (X) and a signal to be tested (X') is created by processing the reference signal (X), for example by coding then decoding the reference signal (X). Both signals (X, X') are transformed into the frequency range in order to create spectral data that are representative of each partial band (i). Signal values (Gi; Gi') for each partial band (i) of both reference signal (X) and signal to be tested (X') are determined from the spectral data of the channels (L, R) of the reference signal or signal to be tested. Conclusions are made about the fidelity of the stereophonic audio signals processed or coded by using a determined processing or coding technique from the comparison of the characteristic values (Gi; Gi') of signals belonging to the same partial band (i).
Claims
GEÄNDERTE ANSPRÜCHE CHANGED CLAIMS
[beim Internationalen Büro am 15. April 1996 (15.04.96) eingegangen; ursprünglicher Anspruch 13 geändert; alle weiteren Ansprüche unverändert (l Seite)][received at the International Bureau on April 15, 1996 (April 15, 1996); original claim 13 changed; all other claims unchanged (l page)]
13. Verfahren nach Anspruch 9 oder 10, bei dem das stereo¬ phone Signal zwei Kanäle (L, R) hat, und13. The method of claim 9 or 10, wherein the stereo¬ phone signal has two channels (L, R), and
bei dem die Korrelationskoeffizienten (k^) für jedes Teilband (i) durch folgende Gleichung gegeben sind:in which the correlation coefficients (k ^) for each subband (i) are given by the following equation:
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002203008A CA2203008C (en) | 1994-10-18 | 1995-10-11 | Method for measuring the conservation of stereophonic audio signals and method for identifying jointly coded stereophonic audio signals |
| KR1019970702416A KR100240440B1 (en) | 1994-10-18 | 1995-10-11 | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together |
| AU38053/95A AU3805395A (en) | 1994-10-18 | 1995-10-11 | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together |
| DE59501665T DE59501665D1 (en) | 1994-10-18 | 1995-10-11 | METHOD FOR MEASURING THE PRESERVATION OF STEREOPHONE AUDIO SIGNALS AND METHOD FOR DETECTING COMMONLY CODED STEREOPHONE AUDIO SIGNALS |
| US08/817,749 US5926553A (en) | 1994-10-18 | 1995-10-11 | Method for measuring the conservation of stereophonic audio signals and method for identifying jointly coded stereophonic audio signals |
| EP95935930A EP0787416B1 (en) | 1994-10-18 | 1995-10-11 | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together |
| DK95935930T DK0787416T3 (en) | 1994-10-18 | 1995-10-11 | Method for measuring the quality of stereophonic audio signals and method for recognizing common coded stereo |
| JP51292696A JP3299543B2 (en) | 1994-10-18 | 1995-10-11 | Method of evaluating stereo audio signal storage and method of identifying jointly coded stereo audio signal |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4437287A DE4437287C2 (en) | 1994-10-18 | 1994-10-18 | Methods for measuring the preservation of stereophonic audio signals and method for recognizing jointly coded stereophonic audio signals |
| DEP4437287.6 | 1994-10-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996012384A1 WO1996012384A1 (en) | 1996-04-25 |
| WO1996012384B1 true WO1996012384B1 (en) | 1996-06-27 |
Family
ID=6531119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/004008 WO1996012384A1 (en) | 1994-10-18 | 1995-10-11 | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5926553A (en) |
| EP (1) | EP0787416B1 (en) |
| JP (1) | JP3299543B2 (en) |
| KR (1) | KR100240440B1 (en) |
| AU (1) | AU3805395A (en) |
| CA (1) | CA2203008C (en) |
| DE (2) | DE4437287C2 (en) |
| DK (1) | DK0787416T3 (en) |
| ES (1) | ES2114333T3 (en) |
| WO (1) | WO1996012384A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19628293C1 (en) * | 1996-07-12 | 1997-12-11 | Fraunhofer Ges Forschung | Encoding and decoding audio signals using intensity stereo and prediction |
| DE19647399C1 (en) | 1996-11-15 | 1998-07-02 | Fraunhofer Ges Forschung | Hearing-appropriate quality assessment of audio test signals |
| DE19821273B4 (en) * | 1998-05-13 | 2006-10-05 | Deutsche Telekom Ag | Measuring method for aurally quality assessment of coded audio signals |
| US20030220801A1 (en) * | 2002-05-22 | 2003-11-27 | Spurrier Thomas E. | Audio compression method and apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3627679A1 (en) * | 1986-08-14 | 1988-02-25 | Blaupunkt Werke Gmbh | FILTER ARRANGEMENT |
| DE3805946A1 (en) * | 1988-02-25 | 1989-09-07 | Fraunhofer Ges Forschung | DEVICE FOR DETERMINING CHARACTERISTIC PARAMETERS FROM THE INPUT AND OUTPUT SIGNALS OF A SYSTEM FOR AUDIO SIGNAL PROCESSING |
| US5285498A (en) * | 1992-03-02 | 1994-02-08 | At&T Bell Laboratories | Method and apparatus for coding audio signals based on perceptual model |
| DE4217276C1 (en) * | 1992-05-25 | 1993-04-08 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | |
| DE4331376C1 (en) * | 1993-09-15 | 1994-11-10 | Fraunhofer Ges Forschung | Method for determining the type of encoding to selected for the encoding of at least two signals |
-
1994
- 1994-10-18 DE DE4437287A patent/DE4437287C2/en not_active Expired - Lifetime
-
1995
- 1995-10-11 ES ES95935930T patent/ES2114333T3/en not_active Expired - Lifetime
- 1995-10-11 EP EP95935930A patent/EP0787416B1/en not_active Expired - Lifetime
- 1995-10-11 JP JP51292696A patent/JP3299543B2/en not_active Expired - Lifetime
- 1995-10-11 DK DK95935930T patent/DK0787416T3/en active
- 1995-10-11 WO PCT/EP1995/004008 patent/WO1996012384A1/en active IP Right Grant
- 1995-10-11 AU AU38053/95A patent/AU3805395A/en not_active Abandoned
- 1995-10-11 KR KR1019970702416A patent/KR100240440B1/en not_active IP Right Cessation
- 1995-10-11 DE DE59501665T patent/DE59501665D1/en not_active Expired - Lifetime
- 1995-10-11 CA CA002203008A patent/CA2203008C/en not_active Expired - Lifetime
- 1995-10-11 US US08/817,749 patent/US5926553A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| HK1245555A1 (en) | Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods | |
| AU682926B2 (en) | Process for coding a plurality of audio signals | |
| DE4428193C2 (en) | Method for coding sound signals | |
| JP3343962B2 (en) | High efficiency coding method and apparatus | |
| US6484140B2 (en) | Apparatus and method for encoding a signal as well as apparatus and method for decoding signal | |
| EP0956668B1 (en) | Method & apparatus for decoding multi-channel audio data | |
| CA2140779A1 (en) | Method, apparatus and recording medium for coding of separated tone and noise characteristics spectral components of an acoustic signal | |
| CN101010725A (en) | Multichannel signal coding equipment and multichannel signal decoding equipment | |
| ATE188305T1 (en) | APPARATUS, METHOD AND SYSTEM FOR COMPRESSING A DIGITAL INPUT SIGNAL IN MORE THAN ONE COMPRESSION MODE | |
| ATE336151T1 (en) | METHOD FOR PROCESSING COMPRESSED AUDIO DATA FOR SPATIAL PLAYBACK | |
| KR20010072906A (en) | Method and apparatus for separation of impulsive and non-impulsive components in a signal | |
| DE69928842T2 (en) | CHANNEL COUPLING FOR AN AC-3 CODIER | |
| KR100303580B1 (en) | Transmitter, Encoding Device and Transmission Method | |
| WO1996012384B1 (en) | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together | |
| EP0746115A3 (en) | Audio signal processing circuit for subband coding | |
| KR100240440B1 (en) | Process for measuring the fidelity of stereophonic audio signals and process for recognising stereophonic audio signals coded together | |
| Farrugia et al. | Pulse-excited LPC for wideband speech and audio coding | |
| KR940017250A (en) | Multichannel Stereo Signal Compression Circuit | |
| JP3099569B2 (en) | Transmission method of acoustic signal | |
| JPH07106977A (en) | Information decoding device | |
| JPH04302532A (en) | High-efficiency encoding device for digital data | |
| CA2211402A1 (en) | Voice-band compression system |