WO2004017553A1 - Auswertung von empfangenen nutzinformationen durch fehlerverschleierungsdetektion - Google Patents
Auswertung von empfangenen nutzinformationen durch fehlerverschleierungsdetektion Download PDFInfo
- Publication number
- WO2004017553A1 WO2004017553A1 PCT/DE2003/002498 DE0302498W WO2004017553A1 WO 2004017553 A1 WO2004017553 A1 WO 2004017553A1 DE 0302498 W DE0302498 W DE 0302498W WO 2004017553 A1 WO2004017553 A1 WO 2004017553A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- error concealment
- information
- received
- useful information
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
Definitions
- the invention relates to a method and a device for evaluating data received via a communication network and containing useful information.
- source coding methods are used to minimize the required transmission bandwidth.
- a channel code protects the compressed data from transmission errors. Can the channel decoder detect errors in the transmission (e.g.
- the source decoder can use error concealment mechanisms to improve the speech quality of the received data.
- the voice channel is used to modulate
- L0 text telephony system means that at time t, instead of a very noisy signal, which would produce poor reliability information in the demodulator and was therefore not taken into account so strongly in channel decoding, a signal from the past was demodulated
- the object of the invention is to propose a method and a device in a cellular mobile communication network for the reception-side detection of unreliably detectable received useful information.
- the object is achieved according to the invention by the subject matter of the 30 independent patent claims relating to the method and the device.
- the essence of the invention is a method for the reception-side detection of an error concealment, e.g. B. a speech decoder decoding the received data, based on the statistical parameters obtained from the received data.
- This can generally be used for the transfer of User information, such as voice, image, video signals, etc., are used, in which error concealment is used at the receiving end.
- reliability information software values
- the AMR mode can be switched using the invention in order to minimize the concealment of errors.
- this method can be used with regard to the quality of the transmitted data to make a decision as to whether data should be retransmitted.
- a major advantage of this method is that no explicit information of a recipient about the use of error concealment is necessary, so it is also suitable for accessories. If you use this procedure with external CTM (Cellular Text telephone Modem) additional devices, the CTM device works without adaptation with different mobile terminal devices. With the help of the invention can be reliably decided whether the received CTM (Cellular Text telephone Modem) additional devices.
- Figure 1 is a simplified representation of the statistical
- FIG. 1 shows how an AMR channel decoder in an AMR receiver (6) receives the transmitted data in the form of TDMA bursts from an equalizer.
- the AMR channel decoder (1) corrects channel errors as far as possible. On the basis of a checksum (CRC), it recognizes (1) whether the channel-decoded AMR speech frame is usable or unusable (in the sense of being excessively disturbed by the transmission). It transfers the decoded speech frame, the AMR mode and the additional information to the AMR speech decoder (2) as to whether the frame is usable.
- the AMR speech decoder (2) uses the BFI (Bad Frame Indicator) in order not to convert unusable frames directly into speech (audio signal), but in this case to synthesize the data containing useful information from frames from the past so that the human Ear perceives only a minimal disturbance (error concealment).
- BFI Bit Frame Indicator
- a PCM Pulse Code Modulation
- the source-decoded audio signal is examined for characteristic features of the error concealment, which indicate with a sufficiently high degree of probability that an error concealment will be used for decoding in the time window examined.
- Useful information can e.g. B. consist of numbers, letters or numbers and letters.
- the CTM receiver (5) consists among other things of a demodulator unit (3) and the error correction module (4).
- the former two bits are generated from 40 PCM signal values, which are contained in the PCM signal in a frequency-modulated manner. Reliability information is added to the bits. The reliability information is erroneously high if the 40 signal values originate from an AMR frame that was actually received unusable. Due to the error concealment, the signal has few acoustic interference components, but has taken the frequency-modulated information from a speech frame of the past and is therefore not usable at the current time.
- a CTM Cellular Text telephone Modem
- a MMR Cellular Text telephone Modem
- Regardless of the voice channel full rate speech, half rate speech, enhanced full rate speech, AMR, future technologies
- information from hearing impaired or speech impaired people can be transmitted by coding letters and transmitting them frequency-modulated in the speech frequency band.
- CTM is developed with robust error protection for mobile transmission.
- the CTM is either an external add-on device for cell phones or it is integrated in the cell phone as a DSP code implemented in firmware. This information and the information relating to reliability are transmitted to the channel decoder of the CTM system.
- the signal energy can also be measured. 5ms corresponds to a quarter of an AMR frame of 20 ms. If there is 5 error concealment in the AMR receiver (6), parameters from previous, correctly received frames are repeated, i.e. a signal is output at time t that is very similar to the signal at time t minus 20 ms, but has lower signal energy (the gain factors become
- Reliability information of the CTM demodulator (3) can be changed to indicate low reliability. The same procedure can be followed if the same subframe in immediately successive 5 ms
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN038186454A CN1675868B (zh) | 2002-08-02 | 2003-07-24 | 通过错误隐蔽检测分析接收到的有用信息的方法和设备 |
US10/523,326 US20050229046A1 (en) | 2002-08-02 | 2003-07-24 | Evaluation of received useful information by the detection of error concealment |
AU2003250800A AU2003250800A1 (en) | 2002-08-02 | 2003-07-24 | Evaluation of received useful information by the detection of error concealment |
EP03787733A EP1525700B1 (de) | 2002-08-02 | 2003-07-24 | Auswertung von empfangenen nutzinformationen durch fehlerverschleierungsdetektion |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EPPCT/EP02/08652 | 2002-08-02 | ||
EP0208652 | 2002-08-02 | ||
DE10240902.1 | 2002-09-04 | ||
DE2002140902 DE10240902B3 (de) | 2002-09-04 | 2002-09-04 | Auswertung von empfangenen Nutzinformationen durch Fehlerverschleierungsdetektion |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004017553A1 true WO2004017553A1 (de) | 2004-02-26 |
Family
ID=31889102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/002498 WO2004017553A1 (de) | 2002-08-02 | 2003-07-24 | Auswertung von empfangenen nutzinformationen durch fehlerverschleierungsdetektion |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050229046A1 (de) |
CN (1) | CN1675868B (de) |
AU (1) | AU2003250800A1 (de) |
WO (1) | WO2004017553A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR0313259A (pt) * | 2002-08-06 | 2005-06-14 | Siemens Ag | Processamento de erros de informações úteis recebidas através de uma rede de comunicação |
US20070174054A1 (en) * | 2006-01-25 | 2007-07-26 | Mediatek Inc. | Communication apparatus with signal mode and voice mode |
CN101442727B (zh) * | 2008-12-30 | 2011-11-16 | 华为技术有限公司 | 信号传输的方法、装置及系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5699405A (en) * | 1994-04-26 | 1997-12-16 | Nec Corporation | Modem card for portable radiophone |
WO1998048531A1 (de) * | 1997-04-23 | 1998-10-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum verschleiern von fehlern in einem audiodatenstrom |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4658436A (en) * | 1982-10-28 | 1987-04-14 | Cincinnati Electronics Corporation | Disguised transmission system and method |
CA2279574C (en) * | 1997-01-31 | 2007-07-24 | The Horticulture & Food Research Institute Of New Zealand Ltd. | Optical apparatus |
US6149867A (en) * | 1997-12-31 | 2000-11-21 | Xy, Inc. | Sheath fluids and collection systems for sex-specific cytometer sorting of sperm |
WO1999052237A1 (en) * | 1998-04-03 | 1999-10-14 | Vertical Networks Inc. | System and method for transmitting voice and data using intelligent bridged tdm and packet buses |
US6188980B1 (en) * | 1998-08-24 | 2001-02-13 | Conexant Systems, Inc. | Synchronized encoder-decoder frame concealment using speech coding parameters including line spectral frequencies and filter coefficients |
US6434198B1 (en) * | 1998-08-28 | 2002-08-13 | Lucent Technologies Inc. | Method for conveying TTY signals over wireless communication systems |
US6363381B1 (en) * | 1998-11-03 | 2002-03-26 | Ricoh Co., Ltd. | Compressed document matching |
JP3411234B2 (ja) * | 1999-04-26 | 2003-05-26 | 沖電気工業株式会社 | 符号化情報受信復号装置 |
US6721707B1 (en) * | 1999-05-14 | 2004-04-13 | Nortel Networks Limited | Method and apparatus for controlling the transition of an audio converter between two operative modes in the presence of link impairments in a data communication channel |
US7208265B1 (en) * | 1999-11-24 | 2007-04-24 | Xy, Inc. | Method of cryopreserving selected sperm cells |
US6968309B1 (en) * | 2000-10-31 | 2005-11-22 | Nokia Mobile Phones Ltd. | Method and system for speech frame error concealment in speech decoding |
US7010017B2 (en) * | 2002-01-30 | 2006-03-07 | Qualcomm Inc. | Receiver noise estimation |
US6618702B1 (en) * | 2002-06-14 | 2003-09-09 | Mary Antoinette Kohler | Method of and device for phone-based speaker recognition |
ES2541121T3 (es) * | 2003-05-15 | 2015-07-16 | Xy, Llc | Clasificación eficiente de células haploides por sistemas de citometría de flujo |
US20060147894A1 (en) * | 2004-12-30 | 2006-07-06 | Vicam, L.P. | Jacketed vessel for holding semen for sex biasing mammals through artificial insemination and systems and methods for enhancing the probability of sex biasing using the same |
EP2268042B1 (de) * | 2005-03-10 | 2014-07-02 | Qualcomm Incorporated | Decoder-Architektur für optimiertes Fehlermanagement in Multimedia-Strömen |
EP1867051A4 (de) * | 2005-04-04 | 2008-03-19 | Research In Motion Ltd | System und verfahren zum codieren und decodieren von informationssignalen |
-
2003
- 2003-07-24 US US10/523,326 patent/US20050229046A1/en not_active Abandoned
- 2003-07-24 CN CN038186454A patent/CN1675868B/zh not_active Expired - Fee Related
- 2003-07-24 AU AU2003250800A patent/AU2003250800A1/en not_active Abandoned
- 2003-07-24 WO PCT/DE2003/002498 patent/WO2004017553A1/de active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5699405A (en) * | 1994-04-26 | 1997-12-16 | Nec Corporation | Modem card for portable radiophone |
WO1998048531A1 (de) * | 1997-04-23 | 1998-10-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum verschleiern von fehlern in einem audiodatenstrom |
Non-Patent Citations (1)
Title |
---|
DORBECKER M ET AL: "The cellular text telephone modem - the solution for supporting text telephone functionality in GSM networks", 2001 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PROCEEDINGS (CAT. NO.01CH37221), 2001 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PROCEEDINGS, SALT LAKE CITY, UT, USA, 7-11 MAY 2001, 2001, Piscataway, NJ, USA, IEEE, USA, pages 1441 - 1444 vol.3, XP002261951, ISBN: 0-7803-7041-4 * |
Also Published As
Publication number | Publication date |
---|---|
US20050229046A1 (en) | 2005-10-13 |
CN1675868B (zh) | 2010-09-29 |
AU2003250800A1 (en) | 2004-03-03 |
CN1675868A (zh) | 2005-09-28 |
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