CN102915743B - Voice prompt playing method and device for conference system - Google Patents
Voice prompt playing method and device for conference system Download PDFInfo
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- CN102915743B CN102915743B CN201210387520.3A CN201210387520A CN102915743B CN 102915743 B CN102915743 B CN 102915743B CN 201210387520 A CN201210387520 A CN 201210387520A CN 102915743 B CN102915743 B CN 102915743B
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Abstract
An embodiment of the invention provides voice prompt playing method and MCU (microcontroller unit) device for a conference system. The method includes: subjecting decoded conference voice signals to VAD (voice activity detection) to determine whether the conference voice signals are phonetically activated or not; and if the decoded conference voice signals subjected to VAD are not phonetically activated, mixing the decoded conference voice signals with prompt voice signals to obtain mixed voice signals. By the method and device, when prompt voice is played during a conference, such cases that normal speaking of a user is interrupted or is disturbed due to improper volume are avoided. User experience is improved effectively. In addition, the embodiment of the invention further provides the MCU device.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method and apparatus of play cuing voice in conference system.
Background technology
Fig. 1 gives the networking diagram of the meeting of a typical multiple terminal by MCU (Multi Control Unit, multipoint control unit) 101d, wherein, does not comprise video section.Because the networking diagram of audio speech conference system is similar, enumerate no longer separately.In the system shown in figure 1, a meeting-place 101a is picked up by microphone 102a and carries out compressed encoding to terminal device 104a to meeting-place voice signal with meeting-place transmitting voice signal, then by the meeting-place voice signal after compressed encoding via Internet Transmission in MCU 101d, other meeting-place 101b, 101c by same mode of operation by meeting-place transmitting voice signal in MCU101d.The meeting-place voice signal of MCU101d to each meeting-place 101a, 101b, 101c is decoded, audio mixing, coding, then the meeting-place voice signal after coding is sent to each meeting-place 101a, 101b, 101c respectively, so just achieve the sound that other multiple meeting-place can be heard mutually in multiple meeting-place.
When convening multipoint conference, some scene MCU needs to send to participant terminal the suggestion voice that will play, with more clear, point out participant carry out some operation or remind participant active conference to be in which type of process significantly.Such as: in conference process, have new meeting-place to add fashionable play cuing voice " welcome adds meeting ", play cuing voice " also have 5 minutes from meeting adjourned " etc. when meeting closes to an end.
Fig. 2 gives in prior art, and MCU realizes the situation to all terminal meeting-place play cuing voice.Composition graphs 1, in conference process, MCU needs to all participant terminal meeting-place play cuing voice, so prior art can directly by demoder DEC (Decoder) 1, DEC2, DEC3 decoding produce pure audio code stream according to audio mixing rule audio mixing complete after again with suggestion voice signal audio mixing, to make scrambler ENC (Encoder) 1, ENC2, the voice data being about to coding that ENC3 receives be audio mixing own data investigation on will audio plays suggestion voice signal, then scrambler ENC1, ENC2, this voice data is carried out compressed encoding by ENC3, terminal meeting-place is sent to play by network again.The above course of work just achieves MCU device should IVR (Interactive Voice Response) prompt tone to all participant terminal meeting-place transmission audio interaction voice.
But there are the following problems for prior art:
1, conventionally, when MCU needs to send audio prompt voice to all participant terminal meeting-place, directly audio prompt voice signal and meeting-place voice signal are carried out mixing to superpose, then send to ENC1,3 (302b, 304b) are sent to terminal meeting-place after encoding and play.Do like this and just make the volume of suggestion voice be difficult to regulate, auditor will be made cannot not hear chairman's sound, and if the too low of suggestion voice may cause auditor not hear suggestion voice and to produce other harmful effects if suggestion voice is too high.
2, on the other hand, because MCU needs to send suggestion voice, so can receive this IVR suggestion voice too as the ENC2 (303b) of Chair site to all meeting-place.So serve as chair continuously speech time, according to current technology, directly suggestion voice can be sent to Chair site, the Chair site of current speech can be made like this to have a kind of speech by the sensation interrupted, experience bad.
Summary of the invention
Given this, be necessary the method and apparatus that play cuing voice in a kind of conference system are provided, in order to solve prior art Problems existing.
On the one hand, the embodiment of the present invention provides the method for play cuing voice in a kind of conference system:
Carry out VAD (Voice Activation Dectection, voice activity detection) to decoded meeting-place voice signal to detect, judge whether described meeting-place voice signal is in voice active state;
If the described decoded meeting-place voice signal detected through VAD is non-speech state, then stereo process is carried out to described decoded meeting-place voice signal and suggestion voice signal, form mixing voice signal.
On the other hand, the embodiment of the present invention provides the MCU device of play cuing voice in a kind of conference system, comprising:
VAD detection module, carries out VAD detection to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
Mix module, if be non-speech state through the described decoded meeting-place voice signal of VAD detection, carry out stereo process to described decoded meeting-place voice signal and suggestion voice signal, forms mixing voice signal.
The embodiment of the present invention carries out VAD detection by meeting-place voice signal, under meeting-place voice signal is in non-speech state, superpose suggestion voice, and current speech can not be interrupted suddenly; Under meeting-place voice signal is in voice active state, AGC (Automatic Gain Control is carried out to suggestion voice, automatic growth control) process, preferentially can ensure that participant terminal can not hear meeting normal sound, putting before this, ensureing that participant terminal can not hear suggestion voice as far as possible.By above beneficial effect, the Consumer's Experience effectively improving speech and listen to, solves prior art Problems existing.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the system architecture figure of prior art;
Fig. 2 is the sound mixing method schematic diagram of prior art;
Fig. 3 is the method flow diagram of the embodiment of the present invention one;
Fig. 4 is the MCU device structural drawing of the embodiment of the present invention two;
Fig. 5 is the MCU device structural drawing of the embodiment of the present invention three;
Fig. 6 is the method flow diagram of the embodiment of the present invention three;
Fig. 7 is the MCU device structural drawing of the embodiment of the present invention four;
Fig. 8 is the method flow diagram of the embodiment of the present invention three;
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with drawings and Examples, the method for play cuing voice in conference system set forth in the present invention and MCU device are described in further details.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
The embodiment of the present invention provides the method for play cuing voice in a kind of conference system, please refer to Fig. 3, and the method comprises:
S101: carry out VAD detection to decoded meeting-place voice signal, judges whether described meeting-place voice signal is in voice active state;
Wherein, before VAD detection is carried out to meeting-place voice signal, receive meeting-place voice signal and decoded.
S103: if be non-speech state through described decoded meeting-place voice signal, then carry out stereo process to described decoded meeting-place voice signal and suggestion voice signal, forms mixing voice signal.
Afterwards, receive above-mentioned mixing voice signal and encoded.
The embodiment of the present invention carries out VAD detection by meeting-place voice signal, suggestion voice is superposed under meeting-place voice signal is in non-speech state, current speech can not be interrupted suddenly, the Consumer's Experience effectively improved, solve prior art Problems existing.
Embodiment 2
The embodiment of the present invention provides the MCU device 10 of play cuing voice in a kind of conference system, please refer to Fig. 4, comprising:
VAD detection module 101, carries out VAD detection to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
Mix module 102, if be non-speech state through the described decoded meeting-place voice signal of VAD detection, carry out stereo process to described decoded meeting-place voice signal and suggestion voice signal, forms mixing voice signal.
Wherein, above-mentioned MCU device 10, also comprises:
Decoder module 103, receives above-mentioned meeting-place voice signal and is decoded, and decoded meeting-place voice signal is sent to VAD monitoring modular 101.
Coding module 104, receives above-mentioned mixing voice signal and is encoded.
Above-mentioned MCU device 10, comprises further:
Suggestion voice module 105, if be voice active state through the described decoded meeting-place voice signal of VAD detection, then postpone and sends described suggestion voice signal to described mix module 102; If the described decoded meeting-place voice signal detected through VAD is non-speech state, then send described suggestion voice signal to described mix module 102;
AGC module 106, carries out AGC process to above-mentioned suggestion voice signal.
Above-mentioned suggestion voice module 105, also for:
If the described decoded meeting-place voice signal detected through VAD is voice active state, then send the suggestion voice signal through AGC process to described mix module.
The embodiment of the present invention carries out VAD detection by meeting-place voice signal, under meeting-place voice signal is in non-speech state, superpose suggestion voice, and current speech can not be interrupted suddenly; Under meeting-place voice signal is in voice active state, AGC process is carried out to suggestion voice, preferentially can ensure that participant terminal can not hear meeting normal sound, is putting before this, ensure that participant terminal can not hear suggestion voice as far as possible.By above beneficial effect, intercut the Consumer's Experience of suggestion voice when effectively improving speech and listen to, solve prior art Problems existing.
Embodiment 3
The embodiment of the present invention provides the method for play cuing voice in a kind of conference system, and as shown in Figure 5, method flow diagram as shown in Figure 6 for the overall architecture figure of the embodiment of the present invention.Below in conjunction with diagram, the method for the embodiment of the present invention is set forth.
S201: receive meeting-place voice signal and decoded.
Decoder module 103 receives meeting-place RTP (the Real-time Transport Protocol that meeting-place terminal sends, real time transport protocol) voice signal being decoded, decoded meeting-place PCM (Pulse-code modulation, pulse code modulation (PCM)) voice signal is sent to mix module 102.
In this example, decoder module 103 (2) receives the meeting-place RTP voice signal of corresponding with it meeting-place terminal transmission and is decoded and be sent to mix module 102.
S202: carry out VAD detection to decoded meeting-place voice signal, judges whether described meeting-place voice signal is in voice active state;
When needs send suggestion voice signal to each meeting-place, such as, in conference process, new meeting-place adds fashionable play cuing voice " welcome adds meeting " etc., and suggestion voice control module 107 controls suggestion voice module 106 and sends suggestion voice signal to mix module 102.
Before suggestion voice module 105 sends suggestion voice signal to mix module 102, suggestion voice module 105 control VAD detection module carries out VAD detection to meeting-place PCM voice signal.
In this example, VAD detection module carries out VAD detection to the meeting-place PCM voice signal that decoder module 103 (2) sends.
S203: if through VAD detect described decoded meeting-place voice signal be non-speech state, then.If the described decoded meeting-place voice signal detected through VAD is voice active state, then postpone the stereo process to described decoded meeting-place voice signal and suggestion voice.
Above-mentioned stereo process is carried out to described decoded meeting-place voice signal and suggestion voice signal, forms the step of mixing voice signal, specifically comprise:
S2031: suggestion voice module 105 sends suggestion voice signal to mix module 102.
S2032: meeting-place PCM voice signal and suggestion voice signal are carried out stereo process by mix module 102, forms mixing voice signal.
Above-mentioned delay, to the step of the stereo process of described decoded meeting-place voice signal and suggestion voice, specifically comprises:
Suggestion voice signaling module 105 postpones to send suggestion voice signal to mix module 102.
It should be noted that, VAD detect, in order to detect people make a speech in meeting speech process between pause, this example utilizes this dead time to superpose suggestion voice just.Those of ordinary skill in the art knows that how using VAD to detect monitors.
S204: receive mixing voice signal and encoded.
Mixing voice signal is sent to coding module 104 by mix module 102; Mixing voice signal is encoded by coding module 104.
The embodiment of the present invention carries out VAD detection by meeting-place voice signal, suggestion voice is superposed under meeting-place voice signal is in non-speech state, current speech can not be interrupted suddenly, and the Consumer's Experience of inter-cut speech prompting when effectively improving speech, solves prior art Problems existing.
Embodiment 4
The embodiment of the present invention provides the method for play cuing voice in a kind of conference system, and as shown in Figure 7, method flow diagram as shown in Figure 8 for the overall architecture figure of the embodiment of the present invention.Below in conjunction with diagram, the method for the embodiment of the present invention is set forth.
S301 and S201 is identical, is not repeated herein.
S302: carry out VAD detection to decoded meeting-place voice signal, judges whether described meeting-place voice signal is in voice active state;
When needs send suggestion voice signal to each meeting-place (such as, in conference process, new meeting-place adds fashionable play cuing voice " welcome adds meeting " etc.), suggestion voice control module 107 controls suggestion voice module 106 and sends suggestion voice signal to mix module 102.
Before suggestion voice module 105 sends suggestion voice signal to mix module 102, suggestion voice module 105 control VAD detection module carries out VAD detection to meeting-place PCM voice signal.
In this example, VAD detection module carries out VAD detection to the meeting-place PCM voice signal that mix module 102 sends.
S303 ': if through VAD detect described decoded meeting-place voice signal be voice active state, then AGC process is carried out to suggestion voice signal, suggestion voice signal after process and described decoded meeting-place voice signal are carried out stereo process, forms mixing voice signal.
S3031 ': if through VAD detect described decoded meeting-place voice signal be voice active state, then suggestion voice signal is sent to AGC module 106 and carries out AGC process by suggestion voice module 105: the volume suitably lowering suggestion voice signal, when ensureing that suggestion voice signal can not heard, the preferential normal quantity ensureing meeting-place voice signal.
If the described decoded meeting-place voice signal detected through VAD is non-speech state, then keeps the default volume of suggestion voice signal, do not carry out AGC process.
It should be noted that, AGC process is a kind of prior art.
Decoded meeting-place voice signal after AGC process is sent to mix module 102 by S3032 ': AGC module 106.
S3033 ': mix module 102 carries out stereo process by decoded meeting-place voice signal with through the suggestion voice signal of AGC process, forms mixing voice signal.
S304 and S204 is identical, is not repeated herein.
The embodiment of the present invention carries out VAD detection by meeting-place voice signal, under meeting-place voice signal is in voice active state, AGC process is carried out to suggestion voice, preferentially can ensure that participant terminal can not hear meeting normal sound, putting before this, ensure that participant terminal can not hear suggestion voice as far as possible, effectively improve the Consumer's Experience intercutting suggestion voice when listening to, solve prior art Problems existing.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can use hardware implementing, or software simulating, or firmware realizes, or their array mode realizes.When implemented in software, above-mentioned functions can be stored in computer-readable medium or as the one or more instruction on computer-readable medium or code and transmit.Computer-readable medium comprises computer-readable storage medium and communication media, and wherein communication media comprises any medium being convenient to transmit computer program from a place to another place.Storage medium can be any usable medium that computing machine can access.Be not limited to as example: computer-readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disc storage, magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or storing the expectation with instruction or data structure form program code and can by any other medium of computer access.In addition.Any connection can be suitable become computer-readable medium.Such as, if software be use concentric cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or such as infrared ray, radio and microwave and so on wireless technology from website, server or other remote source, so the wireless technology of concentric cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave and so on be included in affiliated medium fixing in.As used in the present invention, dish (Disk) and dish (disc) comprise compression laser disc (CD), laser dish, laser disc, Digital Versatile Disc (DVD), floppy disk and Blu-ray Disc, the usual magnetic of its mid-game copy data, what dish then carried out optics with laser copies data.Combination above also should be included within the protection domain of computer-readable medium.
In a word, the foregoing is only the preferred embodiment of technical solution of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for play cuing voice in conference system, it is characterized in that, described method comprises:
Voice activity detection VAD detection is carried out to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
If described decoded meeting-place voice signal is non-speech state, then stereo process is carried out to described decoded meeting-place voice signal and suggestion voice signal, form mixing voice signal;
If the described decoded meeting-place voice signal detected through VAD is voice active state, then postpone to carry out stereo process to described decoded meeting-place voice signal and suggestion voice, form mixing voice signal.
2. method according to claim 1, it is characterized in that, described, if the described decoded meeting-place voice signal detected through VAD is non-speech state, then stereo process is carried out to described decoded meeting-place voice signal and suggestion voice signal, form mixing voice signal, afterwards, described method also comprises:
Receive described mixing voice signal and encoded.
3. in conference system play cuing voice a method, it is characterized in that, described method comprises:
Voice activity detection VAD detection is carried out to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
If the described decoded meeting-place voice signal detected through VAD is voice active state, then automatic growth control AGC process is carried out to described suggestion voice signal;
Suggestion voice signal after process and described decoded meeting-place voice signal are carried out stereo process, forms mixing voice signal.
4. method according to claim 3, is characterized in that, describedly carries out AGC process to described suggestion voice signal, specifically comprises:
Described suggestion voice signal is carried out AGC process, in the scope volume of described suggestion voice signal being remained on do not disturb described meeting-place voice signal.
5. a multipoint control unit MCU, is characterized in that, described MCU comprises:
Voice activity detection VAD detection module, for carrying out VAD detection to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
Mix module, if be non-speech state through the described decoded meeting-place voice signal of VAD detection, carry out stereo process to described decoded meeting-place voice signal and suggestion voice signal, forms mixing voice signal;
Described mix module also for: if the described decoded meeting-place voice signal detected through VAD is voice active state, then postpones to carry out stereo process to described decoded meeting-place voice signal and suggestion voice, form mixing voice signal.
6. multipoint control unit according to claim 5, is characterized in that, described multipoint control unit also comprises:
Coding module, receives described mixing voice signal and is encoded.
7. multipoint control unit according to claim 5, is characterized in that, described multipoint control unit also comprises:
Suggestion voice module, if be voice active state through the described decoded meeting-place voice signal of VAD detection, then postpone and sends described suggestion voice signal to described mix module; If the described decoded meeting-place voice signal detected through VAD is non-speech state, then send described suggestion voice signal to described mix module.
8. a multipoint control unit, is characterized in that, described multipoint control unit comprises:
Voice activity detection VAD detection module, for carrying out VAD detection to decoded meeting-place voice signal, judges whether described decoded meeting-place voice signal is in voice active state;
AGC module, for carrying out automatic growth control AGC process to suggestion voice signal;
Mix module, for the suggestion voice signal after process and described decoded meeting-place voice signal are carried out stereo process, forms mixing voice signal;
Described AGC module, is further used for: described suggestion voice signal is carried out AGC process, in the scope volume of described suggestion voice signal being remained on do not disturb described meeting-place voice signal;
Described multipoint control unit also comprises:
Suggestion voice module, for, if be voice active state through the described decoded meeting-place voice signal of VAD detection, then send the suggestion voice signal through AGC process to described mix module.
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| CN111526145B (en) * | 2020-04-24 | 2022-04-08 | 广州华多网络科技有限公司 | Method, device, system, equipment and storage medium for audio transmission feedback |
| CN113703714B (en) * | 2021-10-29 | 2022-02-08 | 恒林家居股份有限公司 | Conference room sound control method and system based on sound insulation wall |
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| CN1937664A (en) * | 2006-09-30 | 2007-03-28 | 华为技术有限公司 | System and method for realizing multi-language conference |
| CN102025972A (en) * | 2010-12-16 | 2011-04-20 | 中兴通讯股份有限公司 | Mute indication method and device applied for video conference |
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| US8170191B2 (en) * | 2004-08-02 | 2012-05-01 | Polycom, Inc. | Method and system for handling audio signals of conference |
| US8442198B2 (en) * | 2009-10-20 | 2013-05-14 | Broadcom Corporation | Distributed multi-party conferencing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1937664A (en) * | 2006-09-30 | 2007-03-28 | 华为技术有限公司 | System and method for realizing multi-language conference |
| CN102025972A (en) * | 2010-12-16 | 2011-04-20 | 中兴通讯股份有限公司 | Mute indication method and device applied for video conference |
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