CN1335977A - Method and apparatus for decreasing storage requirements for a voice recording system - Google Patents
Method and apparatus for decreasing storage requirements for a voice recording system Download PDFInfo
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- 238000001514 detection method Methods 0.000 claims description 55
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- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/78—Detection of presence or absence of voice signals
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Abstract
A voice recording system for storing data from a two-way conversation, the system includes a microphone (160), a speaker (150), an audio device (102), an audio transmission controller (106), a storage device (110) and a switching circuit (108). The audio transmission controller has an input (120) and an output coupled to the audio device and an input (128) coupled to the microphone and an output (122) coupled to the speaker. The audio transmission controller provides a transmit detect signal, a receive detect signal and an idle detect signal in response to audio transmissions received at the audio transmission controller. The switching circuit is configured to store in the storage device only an active side of the conversation in response to the receive detect signal, the transmit detect signal and the idle detect signal.
Description
Invention field
Relate generally to voice recording system of the present invention.More specifically, the present invention relates to a method and apparatus that is used to reduce the storage demand of voice recording system.
Background
Voice recording system is used to write down the signal of expression for the voice of resetting subsequently.That some such systems are actually simulation and for example on tape, store analog information.Some other system be the numeral and before being recorded in the digital storage media, analog audio information is converted to digital form to digital audio-frequency data.In simulation or digital display circuit, the information of record can be retrieved and be converted to the signal of expression for the voice of resetting subsequently.
The capacity that restriction is a recording medium that voice recording system always faces.This system only can store as many information or the data that can hold with storage medium.This problem often can solve by the capacity that increases storage medium.For example, can use a longer tape or a bigger storer.But this point can not be always feasible.In some devices, for example wireless telephone, the physical size of this device is limited by strictness, and adding more storer is not to be a selection.Another solution relates to the more effective storage of speech information, for example by using known data compression technique packed data to realize.But if can not obtain required processing power, or owing to other reason, audio compression may be infeasible.
Further restriction appears in the both sides' that are designed to write down two-way call system.In a prior art systems, two voice-grade channels (receive and send) are sued for peace on electronics.For example, can on two simulated audio signals, use an operational amplifier to realize this point.Perhaps, two voice-grade channels can be digitized and merge the numerical data of gained.When a channel idle and one other channel in use, the information of system's storage activities channel and in idle channel, add noise.This noise is significantly in the playback of the audio-frequency information of being stored and has reduced the audio quality of resetting.The filtering of noise can be a kind of possibility that is used to improve storage or audio playback quality.But many or most noise is in the frequency band identical with the active channels audio frequency, can not filter effectively.
Therefore, need a kind of improving one's methods and equipment of speech information of in voice recording system, storing, reduce storage demand and the audio quality degradation is minimized by avoiding storing idle channel noise.
Summary
As just introduction, the invention provides a voice processing system, it reduces the storage needs by the activity side that only stores bidirectional dialog.An embodiment monitors the both sides of dialogue and judges which side is activity side.Only store that side.If dialogue is idle and make that any one party of dialogue is not movable in the time cycle arbitrarily, then at one's leisure between during not canned data or data.This has further reduced the storage needs of system.
Brief Description Of Drawings
Fig. 1 is first embodiment of speech treatment circuit;
Fig. 2 is second embodiment of speech treatment circuit; And
Fig. 3 is the part of an audio transmission controller using in the speech treatment circuit of Fig. 1 and Fig. 2.
Detailed description of the Invention
With reference now to Fig. 1,, it has shown a block scheme of speech treatment circuit 100.Speech treatment circuit 100 comprises digital audio device 102, codec 104, audio transmission controller 106, processor 108 and digital memeory device 110.Speech treatment circuit 100 further comprises the loudspeaker 150 and the microphone 160 of the audio interface that is provided for transmitting and receive sub-audible sound.
Digital audio device 102 can be the digital audio data source of any appropriate.In an example embodiment, digital audio device is a wireless telephone, cellular digital signal processor for example.In such application, digital audio device transmits the numerical data of coding between the remainder of a transmission/receiving circuit (not shown) and speech treatment circuit 100.Data are to be used for the form coding of effective wireless radio transmission.Various speech coding technologies, for example Algebraic Code Excited Linear Prediction (ACELP) coding can be used for this purpose.Digital audio device 102 is decoded as speech processing unit 100 spendable a kind of forms to coded data, for example represents the pulse code modulation (pcm) numerical data of voice.The digital audio-frequency data that receives at downlink (that is, from wireless telephonic remote base stations) is placed on the reception data line 112 of exporting on 116.Article one, the digital audio device 102 that sends on the data line 114 is received in the upward digital audio-frequency data of transmission of uplink circuit (to remote base stations) in input 118.Digital audio device 102 uses suitable speech coding technology, a for example ACELP this digital audio-frequency data of encoding, and coded data is sent to transmission/receiving circuit for wireless radio transmission.
Codec 104 is encoder of digital audio-frequency data and analog audio information.Receive digital audio-frequency data from the digital audio device 102 that receives in the input 120 on the data line 112.Digital audio-frequency data provides analog audio information by codec handling and in an output 122 that receives on the tone frequency channel wire 124.Analog audio information in example embodiment has adopted the form that is suitable for driving interchange (AC) signal that loudspeaker 150 produces the sub-audible sound that can be identified as voice.On microphone, receive sub-audible sound and be converted to analog audio information by microphone.Analog audio information is received by the codec on the transmission tone frequency channel wire 126 of an input 128 104.Codec 104 is encoded to digital audio-frequency data to analog audio information, PCM data for example, and in an output 130 that sends on the data line 114, provide this digital audio-frequency data.
Audio transmission controller 106 is duplex controllers that are used for controlling the data stream of two-way communication path.In most preferred embodiment, audio transmission controller 106 comprises one by Philips Semiconductors, Sunnyvale, and California produces, model is the voice conversion speaker-phone integrated circuit of TEA1095.The combination of other device or device can replace and provide similar function.In an application, this integrated circuit provides an audio devices, for example hands-free control of a speaker-phone.In this example embodiment, audio transmission controller 106 comprises transmit amplifier, reception amplifier and duplex controller.Audio transmission controller 106 is connected the audio signal stream that is used for controlling the speech treatment circuit between codec 104 and loudspeaker 150 and the microphone 160.Audio transmission controller 106 produces control signal in response to audio signal stream.In the mode in conjunction with Fig. 3 detailed description, audio transmission controller 106 is provided for the control signal of the operation of processor controls 108 below.
Digital audio device 102, codec 104, audio transmission controller 106 and loudspeaker 150 and microphone 160 combine, and allow the processing of bidirectional dialog.For example in response to the digital audio-frequency data that on digital audio device 102, produces the expression voice at the encoded voice that receives on the radio link.On reception data line 112 digital audio-frequency data is sent to codec 104, data are converted into simulated audio signal thereon.On reception tone frequency channel wire 124, described simulated audio signal is sent to audio transmission controller 106 and the loudspeaker 150 that is used to produce sub-audible sound, finishes the path that is used to talk with first party.
Phase the other side of dialogue, receive sub-audible sound and it is offered audio transmission controller 106 as simulated audio signal at microphone 160.Simulated audio signal is sent to coder 104 immediately on transmission tone frequency channel wire 126.Simulating signal is encoded as digital audio-frequency data, PCM data for example, and be sent to digital audio device 102 on the data line 114 for subsequently transmission sending.This is the path of the second party of bidirectional dialog.
Processor 108 is connected to digital audio device 102 and digital memeory device 110, is used at digital memeory device 110 storage and key numbers voice datas.For this reason, processor 108 has an input 134 that is connected to an input 132 that sends data line 114 and is connected to retrieve data line 112.Further, processor 108 has the two-way I/O 136 that is connected to digital memeory device 110, is used for and digital memeory device 110 communication datas.Digital memeory device 110 in the embodiment in figure 1 preferably is a semiconductor storage, for example a memory integrated circuit.Other storage medium can be replaced.
Processor 108 further has the 142 and inputs 144 of 140, inputs of an input that are connected to audio transmission controller 106, is used for receiving control signal from audio transmission controller 106.This control signal is sending detection line 152, is receiving on detection line 154 and the idle-detection line 156 and transmit.In the embodiment of example, processor 108 responsive control signals are used for an only side's of an expression bidirectional dialog data storage at digital memeory device.
In order to reduce the storage needs, only store the activity side of dialogue.Activity can be with the only side in dialogue, and perhaps it can be the both sides of dialogue for short-term.Send detection line 152 and receive that detection line 154 provides dialogue for processor 108 which side be an indication of the activity side of dialogue.In response to this indication, processor 108 suspends the storage and the data of the activity side that talks with of storage representation only of data of the non-activity side of expression dialogue.In addition, idle-detection line 156 to processor 108 provide the dialogue be idle, without any the indication of a side in activity.In response to the idle-detection signal on the idle-detection line 156, processor 108 suspends the storage of numerical data in digital memeory device 110.And in most preferred embodiment, in response to the idle indication of dialogue on idle-detection line 156, the substantial part of the function circuit of processor 108 by closing processor 108 assigns to enter a low-power mode.
Owing to the duration that a side or the time-out among the both sides in dialogue can have abundant length, the speech treatment circuit 100 of Fig. 1 can substantially reduce the storage needs of digital memeory device 110.In addition, if processor 108 at one's leisure between in outage, reduced the total power consumption of speech treatment circuit 100 so.For example this is an important design object the wireless telephone in particular for the powered battery electronic installation.
Fig. 1 has shown an equipment that is used for the numerical data of storage representation bidirectional dialog.In great majority were used, the processing of numerical data and storage were best.The circuit that comprises integrated circuit is developed fully and is used for such purpose.But in some applications, the processing of analog information and storage may be best.
Therefore, Fig. 2 has shown the block scheme of a speech treatment circuit 200.Speech treatment circuit 200 comprises digital audio device 202, coder 204, audio transmission controller 206, analog switch 208 and analog storage device 210.A loudspeaker 250 and microphone 260 that provides one to be used to transmit and receive the audio interface of sub-audible sound further is provided speech treatment circuit 200.
The speech treatment circuit 200 of Fig. 2 is the speech treatment circuit 100 of application drawing 1 similarly.Digital audio device 202 is operating as the source of a digital audio-frequency data, for example pulse code modulation (pcm) data.Digital audio-frequency data receives an input 220 that is sent to codec 204 on the data line from an output 216 of digital audio device 202 at one.Codec 203 decoded digital voice datas and in the output 222 that receives on the tone frequency channel wire 224, produce simulated audio signal.Simulated audio signal is sent to loudspeaker by audio transmission controller 206.In response to this sound signal, loudspeaker produces sub-audible sound.This has formed a side's of bidirectional dialog path.
For another paths in the bidirectional dialog, microphone detects sub-audible sound and produces simulated audio signal.These simulated audio signals are sent to send tone frequency channel wire 226 and import 228 by codec 204 at one by audio transmission controller 206 and receive.Codec is encoded to digital audio-frequency data, for example PCM data to simulated audio signal, and digital audio-frequency data is sent to transmission data line 214.Digital audio device reception digital audio-frequency data in an input 218 is used for processing subsequently.In this mode, and be similar to the embodiment of Fig. 1, digital audio device 202, codec 204, audio transmission controller 206 and loudspeaker 250 and microphone 260 combine, and allow the processing of a bidirectional dialog.
Fig. 3 has shown the part of an audio transmission controller 300 that uses in the speech treatment circuit of Fig. 1 and Fig. 2.Audio transmission controller 300 comprises duplex controller circuit 302, first adder 304, first comparer 306, second adder 308, second comparer 310 and logic gate 312.The circuit that shows among Fig. 3 is configured to provide the control signal of the speech treatment circuit needs of Fig. 1 and Fig. 2 to receive and detects, sends and detect and idle-detection.
Duplex controller circuit 302 preferably one by Philips Semiconductors, Sunnyvale, California produce, model is the voice conversion speaker-phone integrated circuit of TEA1095.The combination of other device or device can be replaced and similar function is provided.To be described in the operation of the duplex controller circuit 302 in the speakerphone appliance that is different from application of the present invention below.Duplex controller circuit 302 comprises two signals, a speech switching threshold (SWT) and an idle-detection threshold value (IDT).Obtain voltage on the SWT from the circuit of duplex controller circuit 302 inside.This voltage by two channels relatively, be that the signal envelope and the noise envelope of receive channel and transmitting channel obtains.By these envelopes relatively, whether duplex controller circuit 302 judges input signals, promptly send signal or received signal comprises speech or noise.In a speakerphone appliance, capacitor is additional to SWT and by by the current source charge or discharge based on the activity side of dialogue.If detect received signal, to the capacitor charging of speakerphone appliance; If detect the transmission signal, this capacitor discharges.Also do not detect received signal if both detected the transmission signal, the speaker-phone capacitor neither charges and does not also discharge, and the voltage on the SWT equals the voltage on the IDT.In this state, circuit is considered to be in idle pulley.
In the application that in Fig. 3, shows, the voltage on the SWT and the voltage ratio on the IDT.Each voltage is aanalogvoltage, and does not relate to any digital logic level.Each voltage is added on the totalizer, comprises first adder 304 and second adder 308.First adder 304 deducts voltage SWT from voltage IDT and produces a signal IDT-SWT.This is another aanalogvoltage.At first comparer 306 this voltage and a reference voltage are compared, so that sending a transmission of generation detection signal on the detection line 152.Equally, second adder 308 deducts voltage IDT from voltage SWT and produces a signal SWT-IDT.This voltage is added to second comparer 310 and compares with a reference voltage.Comparer is receiving a reception of generation detection signal on the detection line 154.In this example embodiment, being added to two reference voltages on the comparer is 180mV.But, can select other suitable reference voltage.
Transmission detection signal and reception detection signal make up and produce the idle-detection signal.Sending detection signal and receiving the input that detection signal is added to logic gate 312.In this example embodiment, logic gate 312 is NOR doors, but also can substitute with other logical block, and this depends on the relative level that sends detection signal and receive detection signal.The output of logic gate 312 is the idle-detection signals that are added to idle-detection line 156.
The output signal of comparer, transmission detection signal and reception detection signal are the binary voltages that is suitable for the Digital Logic input of processor 108.Similarly, the output of logic gate 312 is binary voltages that are suitable for the Digital Logic input signal.Send the input 142 that detection signal is added to processor 108.Receive the input 142 that detection signal is added to processor 108, the idle-detection signal is added to the input 144 of processor 108.
In operation, audio transmission controller 300 is IDT and SWT voltage relatively, if the difference between these voltages is greater than reference voltage, then comparer judges whether there is transmission condition (for example, IDT-SWT＞reference voltage) or do not have condition of acceptance (SWT-IDT＞reference voltage).If neither exist the transmission condition also not have condition of acceptance, then circuit is indicated an idle condition.These conditions send processor 108 to as control signal.In response, processor 108 is selected a side of dialogue to send storage medium to store.Under the situation of idle condition, control signal also transmits this condition and processor 108 responds by the storage that suppresses voice data or information.
The audio transmission controller 300 that shows in Fig. 3 is configured to be used for the operation with the speech treatment circuit 100 that has the digital voice data storer shown in Figure 1.Audio transmission controller 300 can easily be revised as the operation of the speech treatment circuit 200 that is used for Fig. 2.
From the front, can see that the present invention provides a method and apparatus for a voice recording system with the storage needs that reduce.System detects the activity side of a bidirectional dialog and only stores data or information corresponding to activity side.If without any a side is movable, system detects this idle condition and interrupts the storage of data.In this mode, reduced the storage needs, reduced cost, size and the power consumption of total system.Further, in system, the noise of the non-activity side existence of storage dialogue has not reduced the noise of the existence during playback and the audio fidelity of raising total system.
Though shown and described one particular embodiment of the present invention, can make an amendment.For example, replace receiving separately and sending detection signal, can provide a single scale-of-two reception/transmission signal as a control signal that is used to indicate the active state of bidirectional dialog.Therefore wish in subsidiary claims, to cover whole changes and the modification that drops in true spirit of the present invention and the scope.
Claims (14)
1. a voice recording method comprises the steps:
Detect a bidirectional dialog;
The activity side of identification dialogue and the non-activity side of dialogue; And
Only write down the activity side of dialogue.
2. voice recording method as claimed in claim 1, further comprise when the both sides of bidirectional dialog all the right and wrong activity the time charged timeout step.
3. voice recording method as claimed in claim 1 further comprises the steps:
Select the first party of bidirectional dialog;
Relatively the signal envelope and the noise envelope of first party judge whether first party is the activity side of bidirectional dialog; And
Relatively the opposing party's signal envelope and noise envelope judge whether the opposing party is the activity side of bidirectional dialog.
4. voice recording method as claimed in claim 3 further comprises the steps: if the amplitude of signal envelope surpasses scheduled volume of amplitude of noise envelope, side's right and wrong activity of judgement bidirectional dialog.
5. speech treatment circuit comprises:
Digital audio device is operated in response to digital audio-frequency data;
Be connected to the coder of digital audio device, between simulated audio signal and digital audio-frequency data, change;
Loudspeaker is used to produce sub-audible sound to respond a simulated audio signal;
Microphone is used to produce a simulated audio signal to respond a sub-audible sound; And
The audio transmission controller is connected between coder and loudspeaker and the microphone, is used for controlling the audio signal stream of speech treatment circuit, and the audio transmission controller produces control signal with the response audio signal stream;
Memory storage is used to store numerical data; And
Processor is connected to digital audio device and memory storage, is used at memory storage storage and key numbers voice data, and processor is used to store an only side of bidirectional dialog in response to control signal.
6. the speech processing circuit described in claim 5, wherein, the audio transmission controller produces the transmission/received signal of activity side of one or more expression bidirectional dialogs as control signal, and wherein, processor is used at the digital audio-frequency data of memory storage storage corresponding to the activity side of bidirectional dialog in response to one or more transmission/received signals.
7. the speech processing circuit described in claim 6, wherein, audio transmission controller generation reception detection signal and a transmission detection signal are as control signal, receive the reception detection signal of the activity side of expression bidirectional dialog from digital audio device, and send the transmission detection signal of the activity side of expression dialogue to digital audio device.
8. speech treatment circuit as claimed in claim 7, wherein, when the both sides of bidirectional dialog all the right and wrong activity the time, the audio transmission controller further produces an idle-detection signal as control signal.
9. speech treatment circuit as claimed in claim 8, wherein, processor is not stored the reception of any numerical data with response idle-detection signal.
10. voice recording system that is used to store from the data of bidirectional dialog, described system comprises:
Microphone;
Loudspeaker;
Audio devices;
The audio transmission controller, have an input and an output importing and be connected to loudspeaker exporting and be connected to microphone of being connected to audio devices, the audio transmission controller provides one to send detection signal, a reception detection signal and an idle-detection signal in response to the audio transmission that receives at the audio transmission controller;
Memory storage; And
Be connected to the on-off circuit of audio devices and audio transmission controller, be configured in memory storage, only store the activity side of dialogue in response to receiving detection signal, transmission detection signal and idle-detection signal.
11. the system described in claim 10, wherein, the audio transmission controller is configured to provide the reception detection signal when the audio frequency that receives from audio devices surpasses audio frequency from microphone, and when providing the transmission detection signal above from the audio frequency of audio devices the time from the audio frequency of microphone.
12. the system described in claim 11, wherein, the audio transmission controller provides the idle-detection signal when being configured to the audio frequency that receives when the audio frequency that receives from audio devices with from microphone all less than a predetermined threshold.
13. the system described in claim 11, wherein, when the audio frequency that receives from audio devices surpasses audio frequency from microphone, the audio transmission controller produces the speech switching signal with first value scope, and when the audio frequency that surpasses from the audio frequency of microphone from audio devices, the audio transmission controller produces the speech switching signal with second value scope, and the audio transmission controller produces an idle signal, and wherein the audio transmission controller comprises that one is used for comparison speech switching signal and idle signal receives detection signal to produce, send the comparator circuit of detection signal and idle-detection signal.
14. the system described in claim 13, wherein the audio transmission controller provides described reception detection signal, transmission detection signal and idle-detection signal as the binary signal that is suitable for on-off circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21909398A | 1998-12-22 | 1998-12-22 | |
| US09/219,093 | 1998-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1335977A true CN1335977A (en) | 2002-02-13 |
| CN1153189C CN1153189C (en) | 2004-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998163112A Expired - Fee Related CN1153189C (en) | 1998-12-22 | 1999-11-18 | Method and apparatus for decreasing storage requirements for a voice recording system |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1141937B1 (en) |
| JP (1) | JP2002533770A (en) |
| CN (1) | CN1153189C (en) |
| AT (1) | ATE248421T1 (en) |
| AU (1) | AU1630600A (en) |
| BR (1) | BR9916448A (en) |
| DE (1) | DE69910833T2 (en) |
| WO (1) | WO2000038174A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005207A (en) * | 2009-08-26 | 2011-04-06 | 奥迪康有限公司 | A method of correcting errors in binary masks |
| CN104050973A (en) * | 2013-03-15 | 2014-09-17 | 英特尔公司 | Low power audio trigger via intermittent sampling |
| CN113380261A (en) * | 2021-05-26 | 2021-09-10 | 特斯联科技集团有限公司 | Artificial intelligent voice acquisition processor and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4376874A (en) * | 1980-12-15 | 1983-03-15 | Sperry Corporation | Real time speech compaction/relay with silence detection |
| GB2172475B (en) * | 1985-03-13 | 1988-09-01 | Stc Plc | Packet switching system |
| WO1993013520A2 (en) * | 1991-12-17 | 1993-07-08 | Sundstrand Corporation | Memory conservation data alignment method for solid state recording |
| CA2063631A1 (en) * | 1992-03-20 | 1993-09-21 | Frank R. J. Spitzer | Method and apparatus for recording, storage and retrieval of audio communications |
| GB2296170A (en) * | 1994-12-16 | 1996-06-19 | Ibm | Audio communication apparatus |
| DE69831991T2 (en) * | 1997-03-25 | 2006-07-27 | Koninklijke Philips Electronics N.V. | Method and device for speech detection |
-
1999
- 1999-11-18 AU AU16306/00A patent/AU1630600A/en not_active Abandoned
- 1999-11-18 BR BR9916448-5A patent/BR9916448A/en not_active IP Right Cessation
- 1999-11-18 EP EP99959052A patent/EP1141937B1/en not_active Expired - Lifetime
- 1999-11-18 DE DE69910833T patent/DE69910833T2/en not_active Expired - Fee Related
- 1999-11-18 WO PCT/US1999/027531 patent/WO2000038174A1/en active IP Right Grant
- 1999-11-18 JP JP2000590159A patent/JP2002533770A/en active Pending
- 1999-11-18 AT AT99959052T patent/ATE248421T1/en not_active IP Right Cessation
- 1999-11-18 CN CNB998163112A patent/CN1153189C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005207A (en) * | 2009-08-26 | 2011-04-06 | 奥迪康有限公司 | A method of correcting errors in binary masks |
| CN102005207B (en) * | 2009-08-26 | 2015-05-20 | 奥迪康有限公司 | A method of correcting errors in binary masks |
| CN104050973A (en) * | 2013-03-15 | 2014-09-17 | 英特尔公司 | Low power audio trigger via intermittent sampling |
| CN104050973B (en) * | 2013-03-15 | 2017-08-08 | 英特尔公司 | Via the low-power audio trigger of intermittent sampling |
| CN113380261A (en) * | 2021-05-26 | 2021-09-10 | 特斯联科技集团有限公司 | Artificial intelligent voice acquisition processor and method |
| CN113380261B (en) * | 2021-05-26 | 2021-12-31 | 特斯联科技集团有限公司 | Artificial intelligent voice acquisition processor and method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69910833D1 (en) | 2003-10-02 |
| WO2000038174A1 (en) | 2000-06-29 |
| BR9916448A (en) | 2001-09-04 |
| EP1141937A1 (en) | 2001-10-10 |
| JP2002533770A (en) | 2002-10-08 |
| AU1630600A (en) | 2000-07-12 |
| CN1153189C (en) | 2004-06-09 |
| EP1141937B1 (en) | 2003-08-27 |
| DE69910833T2 (en) | 2004-07-15 |
| ATE248421T1 (en) | 2003-09-15 |
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