WO2014040297A1 - Procédé et dispositif de décodage de trame vocale - Google Patents

Procédé et dispositif de décodage de trame vocale Download PDF

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Publication number
WO2014040297A1
WO2014040297A1 PCT/CN2012/081488 CN2012081488W WO2014040297A1 WO 2014040297 A1 WO2014040297 A1 WO 2014040297A1 CN 2012081488 W CN2012081488 W CN 2012081488W WO 2014040297 A1 WO2014040297 A1 WO 2014040297A1
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WO
WIPO (PCT)
Prior art keywords
decoding
rate
data
speech frame
base station
Prior art date
Application number
PCT/CN2012/081488
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English (en)
Chinese (zh)
Inventor
晏小龙
尹瑞
黄升
高燕
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/081488 priority Critical patent/WO2014040297A1/fr
Priority to CN2012800014357A priority patent/CN103026409A/zh
Publication of WO2014040297A1 publication Critical patent/WO2014040297A1/fr

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection

Definitions

  • the present invention relates to the field of communication systems, and in particular, to a method and an apparatus for decoding a voice frame. Background technique
  • AMR Adaptive Multi Rate voice service
  • 3G 3rd-generation, 3rd generation mobile communication technology
  • GSM Global System for Mobile communication
  • the core idea of AMR is to continuously adjust the uplink and downlink voice coding mode according to the change of the downlink signal quality on the GSM air interface, so as to achieve the optimal balance of voice quality and system capacity, and improve the accuracy of voice transmission.
  • a feature of AMR is that the rate of change can occur at any time as the voice quality changes.
  • the GSM AMR related protocol when decoding an AMR speech frame, it is necessary to match the decoding rate of the current speech frame, and then decode the data of the speech frame according to the decoding rate. If the decoding rate of the speech frame matches incorrectly, the decoding rate does not match the encoding rate of the speech frame, resulting in a data decoding error of the speech frame, thereby losing the speech frame.
  • the data of the speech frame is usually decoded by the decoding rate indicated in the speech frame.
  • the prior art cannot correct the current error translation.
  • the code rate causes a high probability of decoding failure, which makes the system decoding performance not! 3 ⁇ 4.
  • the present invention provides a method and a device for decoding a voice frame.
  • the base station fails to decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication, the base station selects the voice frame corresponding to the voice frame from the preset rate set.
  • the correct decoding rate decodes the data of the speech frame, which improves the decoding performance of the system.
  • a first aspect of the present invention provides a method for decoding a voice frame, including: Receiving, by the base station, a voice frame sent by the mobile terminal;
  • the base station obtains a decoding rate indication, and decodes data of the voice frame according to a decoding rate indicated in the decoding rate indication;
  • the base station When the base station fails to decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication, the base station selects a decoding rate from a preset rate set to perform data on the voice frame. Decoding.
  • the method further includes:
  • the base station When the base station successfully decodes data of the voice frame according to the selected decoding rate, the base station acquires data after successfully decoding data of the voice frame; or
  • the base station When the base station fails to decode data of the voice frame according to the selected decoding rate, the base station selects a decoding rate from the preset rate set to decode data of the voice frame.
  • the base station selects a decoding rate from the preset rate set to the voice frame.
  • Data decoding includes:
  • the base station decodes the data of the voice frame by selecting a decoding rate from the preset rate set according to a decoding rate from low to high.
  • the method further includes: When the base station determines that the discontinuous transmission DTX of the preset mobile terminal is turned on, the base station decodes the current received frame according to the obtained decoding rate, and the voice frame is a type of the received frame;
  • the base station When the base station fails to decode the current received frame according to the acquired decoding rate, the base station terminates decoding of the current received frame.
  • the decoding rate indication includes at least one of a codec rate indication CMI, a last codec rate indication LAST CMI, and an encoding mode command CMC.
  • a second aspect of the present invention provides a decoding apparatus for a voice frame, including: a receiving unit, configured to receive a voice frame sent by a mobile terminal;
  • a decoding unit configured to obtain a decoding rate indication, and decode data of the voice frame received by the receiving unit according to the decoding rate indicated in the decoding rate indication;
  • a selecting unit configured to: when the decoding unit fails to decode data of the voice frame according to a decoding rate indicated in the decoding rate indication, select a decoding rate from a preset rate set;
  • the decoding unit is further configured to decode data of the voice frame according to a decoding rate selected by the selecting unit from the preset rate.
  • the device further includes:
  • an acquiring unit configured to acquire data after successfully decoding the data of the voice frame when the data of the voice frame is successfully decoded according to the decoding rate selected by the selecting unit.
  • the selecting unit is further configured to: when decoding data of the voice frame fails according to the selected decoding rate, select a decoding rate from the preset rate set to translate data of the voice frame code.
  • the selecting unit is specifically configured to use the preset from the low-to-high decoding rate The rate is selected centrally to select the decoding rate.
  • the decoding unit is further configured to: when the discontinuous transmission DTX of the preset mobile terminal is turned on, The current received frame is decoded according to the obtained decoding rate, and the voice frame is a type of the received frame.
  • the device further includes: And a terminating unit, configured to terminate decoding of the current received frame when the current received frame fails to be decoded according to the decoding rate.
  • the decoding rate indication includes at least one of a codec rate indication CMI, a last codec rate indication LAST CMI, and an encoding mode command CMC.
  • a third aspect of the present invention provides a base station, including:
  • processor an input device, an output device, and a memory, wherein the input device, the output device, and the memory are connected to the processor;
  • the processor is configured to receive a voice frame sent by the mobile terminal, and then obtain a decoding rate indication, and decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication, when When the decoding rate indicated in the decoding rate indication fails to decode the data of the speech frame, the data of the speech frame is decoded by selecting a decoding rate from a preset rate set.
  • the processor is further configured to acquire data of the voice frame when the data of the voice frame is successfully decoded according to the selected decoding rate. Data after successful decoding; or,
  • the data of the speech frame fails to be decoded according to the selected decoding rate
  • the data of the speech frame is decoded by selecting a decoding rate from the pre-set rate set.
  • the processor is specifically configured to use a low to high decoding rate according to a decoding rate
  • the pre-set rate set selects the decoding rate.
  • the processor is further used When the discontinuous transmission DTX of the preset mobile terminal is turned on, the current received frame is decoded according to the obtained decoding rate, and the voice frame is a type of the received frame; The processor is further configured to terminate decoding of the current received frame when the current received frame fails to be decoded according to the obtained decoding rate.
  • the decoding rate indication includes at least one of a codec rate indication CMI, a last codec rate indication LAST CMI, and an encoding mode command CMC.
  • the method and device for decoding a voice frame provided by the embodiment of the present invention, first, the base station receives the voice frame sent by the mobile terminal; and then decodes the data of the voice frame according to the decoding rate indicated in the decoding rate indication; When the base station fails to decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication, the base station selects a decoding rate from a preset rate set to translate the data of the voice frame. code.
  • the base station fails to decode according to the decoding rate indicated by the voice frame, the base station cannot correct the current error decoding rate, resulting in a high probability of decoding failure, thereby enabling system translation. The code performance is not high. In the case that the decoding rate decoding indicated by the speech frame fails, the data of the speech frame is decoded by selecting the correct decoding rate corresponding to the speech frame from the preset rate set, thereby improving the decoding of the system. performance.
  • FIG. 1 is a flowchart of a method for decoding a voice frame according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a decoding apparatus for a voice frame according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another method for decoding a voice frame according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of another apparatus for decoding a voice frame according to an embodiment of the present invention. detailed description
  • This embodiment provides a method for decoding a voice frame. As shown in FIG. 1, the method includes:
  • the base station receives a voice frame sent by the mobile terminal.
  • the base station obtains a decoding rate indication, and decodes data of the voice frame according to the decoding rate indicated in the decoding rate indication.
  • the decoding rate indication includes a codec mode indication (CMI), a last codec rate indication LAST CMI, and a code mode command (codec mode command, CMC). At least one of the LAST CMIs is a CMI in a previous speech frame compared to a current speech frame.
  • CMI codec mode indication
  • LAST CMI last codec rate indication
  • CMC code mode command
  • the obtaining the decoding rate indication may specifically include: the LAST CMI is indication information that is stored in the base station after the base station acquires the CMI of the last voice frame; the CMI is information carried in the voice frame,
  • the uplink rate used by the mobile terminal can be obtained by parsing the currently received voice frame.
  • the CMC is the uplink rate used by the network side to notify the mobile terminal. Since it is sent to the terminal by the base station, it can be directly obtained.
  • the base station fails to decode data of the voice frame according to a coding rate indicated in the coding rate indication, the base station selects a decoding rate from the preset rate set to the voice frame. The data is decoded.
  • the maximum number of decoding rates that can be included in the preset rate set is eight, and the specific decoding rate is preset according to the actual situation, and the present invention does not limit the present invention. Set.
  • the decoding rate can be selected from the preset rate set.
  • the data of the frame is decoded again, so that the base station can reacquire the correct decoding rate to correctly decode the data of the voice frame, thereby improving the probability of successful decoding, thereby improving the decoding performance of the system.
  • the present embodiment provides a decoding apparatus for a voice frame.
  • the apparatus may be a base station, and the apparatus includes: a receiving unit 2 1 , a decoding unit 22 , and a selecting unit 23 .
  • the receiving unit 2 1 can be configured to receive a voice frame sent by the mobile terminal.
  • the decoding unit 22 may be configured to obtain a decoding rate indication, and decode data of the voice frame received by the receiving unit 21 according to the decoding rate indicated in the decoding rate indication.
  • the decoding rate indication includes at least one of a codec rate indication CM I, a last codec rate indication LAST CM I, and an encoding mode command CMC, where the LAST CM I is compared to the current speech frame.
  • CM I codec rate indication
  • LAST CM I last codec rate indication
  • CMC encoding mode command
  • the selecting unit 2 3 may be configured to select a decoding rate from the preset rate set when the decoding unit 22 fails to decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication. .
  • the selected decoding rate decodes the data of the speech frame.
  • the entity of the decoding device of the voice frame provided in this embodiment may be a base station.
  • the base station includes: a processor 31, an input device 32, an output device 33, a memory 34, and the input device 32.
  • An output device 33 and a memory 34 are connected to the processor 31.
  • the processor 31 may be configured to receive a voice frame sent by the mobile terminal, and then decode the data of the voice frame according to a decoding rate indicated in the decoding rate indication, when the translation is indicated according to the decoding rate indication.
  • the code rate fails to decode the data of the speech frame
  • the data of the speech frame is decoded by selecting a decoding rate from a preset rate set.
  • the decoding rate to the voice frame may be selected from the preset rate set. The data is decoded again, so that the correct decoding rate is reacquired to correctly decode the data of the speech frame, thereby improving the probability of successful decoding, thereby improving the decoding performance of the system.
  • This embodiment provides another method for decoding a voice frame. As shown in FIG. 4, the method includes: 401.
  • a base station receives a voice frame sent by a mobile terminal.
  • the base station acquires a decoding rate indication, and decodes data of the voice frame according to the decoding rate indicated in the decoding rate indication.
  • the decoding rate indication includes at least one of a codec rate indication CMI, a last codec rate indication LAST CMI, and an encoding mode command CMC, and the LAST CMI is a previous speech frame compared to a current speech frame.
  • the CMI Specifically, when the current voice frame is a CMI time, the base station decodes the data of the voice frame according to the decoding rate indicated by the CMI.
  • the base station decodes data of the speech frame according to a coding rate indicated by the LAST CMI, when the base station translates according to the LAST CMI indication
  • the base station decodes the data of the voice frame according to the decoding rate indicated in the CMC.
  • the base station fails to decode data of the voice frame according to a decoding rate indicated in the decoding rate indication, the base station selects a decoding rate from the preset rate set to the voice frame. The data is decoded.
  • the maximum number of the rate that can be included in the preset rate set is eight, and the preset rate is preset according to the actual situation, which is not limited by the present invention.
  • the base station When the base station successfully decodes data of the voice frame according to the selected decoding rate, the base station acquires data after successfully decoding data of the voice frame.
  • the base station fails to decode data of the voice frame according to the selected decoding rate, the base station selects a decoding rate from the preset rate set to the voice frame. The data is decoded.
  • the base station can select a decoding rate from the rate set according to a coding rate from low to high, and decode the data of the speech frame according to the selected decoding rate.
  • the base station when the base station determines that the discontinuous transmission DTX of the preset mobile terminal is turned on, the base station decodes the current received frame according to the obtained decoding rate, and the voice frame is a type of the received frame.
  • Type when the base station fails to decode the current received frame according to the obtained decoding rate, the base station terminates decoding of the current received frame. In this way, when the base station judges that the DTX of the pre-set mobile terminal is turned on, unnecessary duplication decoding caused by decoding the decoding rate from the preset rate set can be avoided. Assume that the current received frame is an invalid data NO-DATA frame, but the base station decodes the current received frame as a speech SPEECH frame. If the decoding rate is still selected from the preset rate set at this time, decoding will be unnecessary. Because the N0_DATA frame does not carry data, the base station has no meaning in decoding the N0_DATA frame.
  • the base station may select and decode from the preset rate set.
  • the rate re-decodes the data of the voice frame, so that the base station can reacquire the correct decoding rate to correctly decode the data of the voice frame, thereby improving the probability of successful decoding.
  • unnecessary decoding of the NO_DATA frame by the base station can be avoided.
  • the present embodiment provides another decoding apparatus for a voice frame.
  • the apparatus may be a base station, and includes: a receiving unit 51, a decoding unit 52, a selecting unit 53, an obtaining unit 54, and a terminating unit 55. .
  • the receiving unit 51 is configured to receive a voice frame sent by the mobile terminal.
  • the decoding unit 52 may be configured to obtain a decoding rate indication, and according to the decoding rate indication The decoding rate indicated in the decoding decodes the data of the speech frame received by the receiving unit 51.
  • the decoding rate indication includes at least one of a codec rate indication CM I, a last codec rate indication LAST CM I, and an encoding mode command CMC. See step 102 for a description of the decoding rate indication.
  • the selected decoding rate decodes the data of the speech frame.
  • the decoding unit 52 is further configured to: when the discontinuous transmission DTX of the preset mobile terminal is turned on, decode the current received frame according to the obtained decoding rate, where the voice frame is a type of the received frame. .
  • the selecting unit 53 may be configured to select and decode from a preset rate set when the decoding unit 52 fails to decode the data of the voice frame according to the decoding rate indicated in the decoding rate indication. rate.
  • the selecting unit 53 may be further configured to: when the data of the voice frame fails to be decoded according to the selected decoding rate, select a decoding rate from the preset rate set to perform data on the voice frame. Decoding.
  • the selecting unit 5 3 may be specifically configured to select the decoding rate from the preset rate set according to the principle that the decoding rate is from low to high.
  • the obtaining unit 54 may be configured to acquire data after successfully decoding the data of the voice frame when the data of the voice frame is successfully decoded according to the decoding rate selected by the selecting unit 53.
  • the terminating unit 5 5 may be configured to terminate decoding of the current received frame when the decoding unit 52 fails to decode the current received frame according to the decoding rate.
  • the entity of the decoding apparatus of another voice frame provided in this embodiment may be a base station.
  • the base station may include: a processor 31, an input device 32, an output device 33, and a memory 34.
  • An input device 32, an output device 33, and a memory 34 are connected to the processor 31.
  • the processor 31 may be configured to receive a voice frame sent by the mobile terminal, and then decode the data of the voice frame according to a decoding rate indicated in the decoding rate indication, according to the decoding speed.
  • the decoding rate indicated in the rate indication fails to decode the data of the speech frame
  • the data of the speech frame is decoded by selecting a decoding rate from a preset rate set.
  • the processor 3 1 may be specifically configured to: when the data decoding of the voice frame fails, select a decoding rate from the rate set, and translate the data of the voice frame according to the selected decoding rate. code.
  • the processor 3 1 is further configured to: when the data of the voice frame is successfully decoded according to the selected decoding rate, acquire data after successfully decoding data of the voice frame.
  • the processor 3 1 may be further configured to: when the data of the voice frame fails to be decoded according to the selected decoding rate, select a decoding rate from the preset rate set to perform data on the voice frame. Decoding.
  • the processor 3 1 may be specifically configured to select a decoding rate from the preset rate set according to a low to high original U 'j of a decoding rate.
  • the processor 3 1 may be further configured to: when the discontinuous transmission DTX of the preset mobile terminal is turned on, decode the current received frame according to the obtained decoding rate, where the voice frame is a type of the received frame. .
  • the processor 3 1 may be further configured to terminate decoding of the current received frame when the decoding of the current received frame fails according to the obtained decoding rate.
  • Another decoding apparatus for a voice frame may select a decoding rate from a preset rate set in a case where data decoding of a voice frame fails according to a decoding rate indicated in a decoding rate indication.
  • the data of the speech frame is decoded again, so that the correct decoding rate can be reacquired to correctly decode the data of the speech frame, thereby improving the probability of successful decoding.
  • unnecessary duplication decoding of the NO_DATA frame can be avoided.
  • the decoding device of the voice frame provided by the embodiment of the present invention may implement the foregoing method embodiment.
  • the method and device for decoding a voice frame provided by the embodiments of the present invention can be applied to the field of communication systems, but not only Limited to this.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif destinés au décodage d'une trame vocale. Le procédé consiste en ce que : une station de base reçoit d'abord une trame vocale envoyée par un terminal mobile, puis décode les données de la trame vocale selon un débit de décodage indiqué dans une indication de débit de décodage, et lorsque la station de base ne réussit pas à décoder les données de la trame vocale selon le débit de décodage indiqué dans l'indication de débit de décodage, la station de base sélectionne un débit de décodage parmi un ensemble prédéfini de débits afin de décoder les données de la trame vocale. Dans la présente invention, lorsqu'une station de base ne réussit pas à décoder les données d'une trame vocale via un débit de décodage indiqué dans une indication de débit de décodage, les données de la trame vocale sont décodées en sélectionnant un débit de décodage correct, correspondant à la trame vocale, parmi un ensemble prédéfini de débits, améliorant de cette façon les performances de décodage du système. La présente invention est applicable au domaine des systèmes de communication.
PCT/CN2012/081488 2012-09-17 2012-09-17 Procédé et dispositif de décodage de trame vocale WO2014040297A1 (fr)

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PCT/CN2012/081488 WO2014040297A1 (fr) 2012-09-17 2012-09-17 Procédé et dispositif de décodage de trame vocale
CN2012800014357A CN103026409A (zh) 2012-09-17 2012-09-17 语音帧的译码方法及装置

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PCT/CN2012/081488 WO2014040297A1 (fr) 2012-09-17 2012-09-17 Procédé et dispositif de décodage de trame vocale

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CN105741840B (zh) * 2016-04-06 2020-01-03 北京云知声信息技术有限公司 一种语音控制方法及装置

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