WO2010094219A1 - Procédé et dispositif de traitement et de reproduction de signaux vocaux - Google Patents

Procédé et dispositif de traitement et de reproduction de signaux vocaux Download PDF

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Publication number
WO2010094219A1
WO2010094219A1 PCT/CN2010/070491 CN2010070491W WO2010094219A1 WO 2010094219 A1 WO2010094219 A1 WO 2010094219A1 CN 2010070491 W CN2010070491 W CN 2010070491W WO 2010094219 A1 WO2010094219 A1 WO 2010094219A1
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WO
WIPO (PCT)
Prior art keywords
site
largest
frequency band
information
orientation
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Application number
PCT/CN2010/070491
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English (en)
Chinese (zh)
Inventor
梁丽燕
刘智辉
Original Assignee
华为终端有限公司
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Publication of WO2010094219A1 publication Critical patent/WO2010094219A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42203—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/4223—Cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting

Definitions

  • the present invention relates to the field of video communication technologies, and in particular, to a method and apparatus for processing and playing a voice signal.
  • each conference site participating in the conference encodes the local voice signal and image signal and sends it to the MCU (Multipoint Control Unit), and the MCU processes the received voice signal and image signal, and processes the signal.
  • the subsequent voice signal and image signal are sent to each venue terminal, and the conference field plays the decoded voice signal and the image signal, thereby realizing video communication.
  • the MCU calculates the envelope of the voice signal of each site after the speech signal is processed, and compares the envelopes of the voice signal to the N sites with the largest envelope as the largest N-party venue, and then maximizes The voice signal of the N-party site is mixed and sent to other sites outside the largest N-party site in the conference.
  • the voice signal received by the largest N-party site is the voice signal of the largest N-1 party site other than the site where it is located. Mix signal. Therefore, after the conference site decodes the received mix signal, the other N-party sites can hear the voice of the largest N-party site, and the largest N-party can hear the other N-1. The voice of the party venue.
  • Embodiments of the present invention provide a method and apparatus for mixing and playing a voice signal to improve the spatial hearing effect of the video conference.
  • the embodiment of the invention discloses a method for processing a voice signal, comprising: determining, at a maximum N-party venue, each time in the mixed signal according to the orientation information set for the meeting place participating in the conference Azimuth information of the site with the largest energy in the frequency band; the sounding signal of the largest N-party site and the orientation information of the site with the largest energy in each frequency band at each time are sent to the conference terminal participating in the conference.
  • the embodiment of the invention further discloses a method for playing a voice signal, comprising: acquiring a mixing signal of a maximum N-party venue and a position information of a site with the largest energy in each frequency band at each time; according to the auditory space parameter of the playing device Corresponding relationship between the orientation information, obtaining an auditory spatial parameter of the playback device corresponding to the orientation information of the site with the largest energy at each frequency band at each time; adjusting the mix by using the auditory spatial parameter of the playback device Signal, and play the adjusted mix signal.
  • the embodiment of the invention further discloses a processing device for a voice signal, comprising: an orientation determining unit, configured to determine each moment in the mixed signal in the largest N-party venue according to the orientation information set for the meeting place participating in the conference The orientation information of the site with the largest energy in each frequency band; the sending unit, configured to send the sound mixing signal of the largest N-party meeting site and the position information of the site with the largest energy in each frequency band at each time to the conference terminal participating in the meeting .
  • the embodiment of the invention further discloses a playback device for a voice signal, comprising: an acquisition unit, configured to acquire a sound mixing signal of a maximum N-party venue and a position information of a site with the largest energy in each frequency band at each time; a unit, configured to obtain, according to a correspondence between the auditory spatial parameter and the azimuth information of the playback device, an auditory spatial parameter of the playback device corresponding to the orientation information of the site with the largest energy in each frequency band at each time; And for adjusting the mixing signal by using an auditory space parameter of the playing device, so as to play the adjusted mixing signal.
  • the orientation information when processing the voice signal, the orientation information is set in advance for all the sites participating in the conference, and in the largest N-party conference site, the orientation of the site with the largest energy in each frequency band at each moment is determined. Information, the orientation information is sent together with the mixing signal of the largest N-party venue.
  • the spatial parameters of each playing device at the playing end are obtained, and the spatial parameters of the playing device are used to adjust the mixing signal.
  • the auditory space of each mixing site can be reconstructed at the venue, so that the sound of the largest N-party venue has a spatial stereoscopic feeling during playback, and the user can clearly understand each of the largest N-party venues.
  • the sound of the user adds to the user's experience of the spot.
  • FIG. 2-a is a schematic diagram of a position of 10 conference venues
  • Figure 2-b is a schematic diagram of the orientation of four sites in a multi-screen
  • Figure 3-a shows the orientation of the four largest 4-party venues
  • Figure 3-b is a schematic diagram of the orientation of four sites in a multi-screen
  • Figure 4 shows the setting method of the orientation when the number of multi-screens is 16, and the number of orientations is 4;
  • Figure 5 is a schematic diagram of processing of a voice signal in the present invention.
  • FIG. 6 is a structural diagram of a method for processing a voice signal according to Embodiment 2 of the present invention
  • FIG. 7 is a flowchart of a method for playing a voice signal according to Embodiment 3 of the present invention
  • FIG. 9 is a structural diagram of a device for playing a voice signal according to Embodiment 4 of the present invention.
  • FIG. 1 is a flowchart of a method for processing a voice signal according to the present invention, where the method includes the following steps:
  • Step 101 Determine, according to the orientation information set for the conference venue participating in the conference, the location information of the site with the largest energy in each frequency band at each moment in the mixed signal in the maximum N-party conference site;
  • the voice signal of the largest N-party site is first time-frequency transformed, the voice signal in the time domain is converted into a voice signal in the frequency domain, and then the energy value in each frequency band at each time is calculated, and each time is obtained.
  • the site with the highest energy in each frequency band is finally determined according to the orientation information set for the meeting place participating in the meeting, and the orientation information of the site with the largest energy in each frequency band is determined.
  • the location information of the site with the largest energy in the largest N-party site in each frequency band at each time can be determined by two methods.
  • a method for determining the method is as follows: According to the order of joining the conference sites participating in the conference, the orientation of the conference site is set in advance. When comparing the energy of each band in the speech signal by comparing the largest N-party venue After obtaining the site with the largest energy in the largest N-party site in each frequency band at each time, it is determined whether the site with the largest energy is in the multi-screen, and if so, the orientation information of the site with the largest energy is set to be more The screen orientation information, if not, sets the orientation information of the site with the largest energy to the preset orientation information. For example, in a videoconferencing system, there are ten venues participating in the conference. The first conference site number is 1, the second conference site number is 2, and so on. The tenth conference site number is 10.
  • the orientation of field 1-3 is set to the upper left
  • the orientation of field 4-6 is set to the upper right
  • the orientation of field 7-8 is set to the lower left, which will be 9-10.
  • the orientation is set to the lower right, please refer to Figure 2-a.
  • Figure 2-a shows the orientation of the 10 joining venues.
  • the site 1-4 is the largest 4-party site, and in a certain frequency band at a certain time, the site 1 is the site with the largest energy in the largest 4-party site, and it is determined whether the site 1 is in the multi-screen, when the site 1 In multi-screen, set the orientation information of field 1 in multi-screen to the orientation information of site 1.
  • site 1 is at the bottom right of the multi-screen, see Figure 2-b, Figure 2-b is multi-screen.
  • the orientation information of the four sites is the right lower part of the site.
  • the orientation information of the site is obtained.
  • the orientation information of the site 1 is the upper left.
  • the other method is as follows: After determining the maximum N-party site, the orientation of the largest N-party site is set in advance according to the order of joining the largest N-party site, and the orientation information of the largest N-party site is obtained.
  • the orientation information of the site with the largest energy is set as the orientation information of the site with the largest energy in the multi-screen, and if not, the site with the largest energy.
  • the orientation information is set to the orientation information of the preset maximum N-party venue. Take the video communication between the above ten sites as an example.
  • the venues 1-4 are the maximum 4-party venues. According to the order of joining the venues 1-4, the orientation of the field 1 is set to the upper left, and the orientation of the field 2 is set. For the upper right, set the orientation of field 3 to the lower left, and set the orientation of field 4 to the lower right. See Figure 3-a. Figure 3-a shows the orientation of the four largest 4-party venues.
  • the orientation information of the site 1 in the multi-screen is set to the orientation information of the site 1.
  • the site 1 is at the lower right of the multi-screen.
  • Figure 3-b shows the orientation of the four sites in the multi-screen.
  • the location information of field 1 is When the site 1 is not in the multi-screen, it can be obtained according to the preset position of the maximum 4-party site.
  • the orientation information of the site 1 is the upper left.
  • the orientation information of the site with the largest energy also changes correspondingly with the change of the orientation.
  • the conference site 1-4 is the maximum 4-party venue.
  • the orientation of the field 1 is set to the upper left
  • the orientation of the field 2 is Set to the upper right, set the orientation of field 3 to the lower left, and set the orientation of field 4 to the lower right.
  • the site 1 is the site with the largest energy in the largest 4-party site
  • the orientation information of the field 1 is the orientation information of the site 1 in the multi-screen, assuming The orientation of the site 1 in the multi-screen is the upper left, and the orientation information of the field 1 is the upper left.
  • the orientation information of field 1 changes accordingly to the upper right.
  • the method for setting the orientation information of the site with the largest energy in the largest N-party site is not limited, and the orientation information is not limited to the four directions of the upper left, the upper right, the lower left, and the lower right.
  • the site in the multi-picture cannot completely correspond to any one of the positions.
  • the site in the multi-picture cannot correspond to any one of the positions, and the most similar position is taken for the site in the multi-picture.
  • 4 is a setting method in which the number of multi-pictures is 16, and the number of orientations is 4, and the orientation of the venue 7 in the figure is set to the upper right according to the approximation principle.
  • Step 102 Send the mixed signal of the largest N-party venue and the orientation information of the site with the highest energy in each frequency band at each time.
  • the sound mixing signal of the largest N-party site and the orientation information of the site with the largest energy in each frequency band at each time are first encoded, respectively, and the mixed code stream and the position information stream are respectively obtained, and then the sound is mixed.
  • the code stream and the azimuth information code stream are sent to the site terminal participating in the conference; or, only the mixed signal of the largest N-party site may be encoded to obtain a mixed code stream, and then the mixed code stream and each time of each time
  • the location information of the site with the largest energy in the frequency band is sent to the site terminal participating in the conference. For example, if the destination site belongs to the largest N-party site, the mix signal sent to the site is the mix signal of the largest N-1 site other than the site.
  • FIG. 5 is a schematic diagram of processing of a voice signal according to the present invention.
  • FIG. 6 is a structural diagram of a processing apparatus for a voice signal according to the present invention.
  • the apparatus includes an orientation determining unit 601 and a transmitting unit 602. The internal structure and connection relationship will be further described below in conjunction with the working principle of the device.
  • the position determining unit 601 is configured to determine, according to the orientation information set for the meeting place of the meeting, the orientation information of the site with the largest energy in each frequency band at each time in the largest N-party meeting place;
  • the sending unit 602 is configured to send the sound mixing signal of the largest N-party venue and the orientation information of the site with the largest energy in each frequency band at each time.
  • the orientation determining unit 601 may include: a first orientation determining unit 603, configured to pre-set an orientation for the conference site participating in the conference according to the order of joining, to obtain preset orientation information; and comparing unit 604, for comparing The maximum value of the energy value of the voice signal of each of the N-party sites in each frequency band is obtained, and the first setting unit 605 is configured to: when the site with the largest energy is not in the multi-picture, according to The preset orientation information sets the orientation information of the site with the largest energy; the second setting unit 606 is configured to set the orientation information of the site with the largest energy according to the multi-screen orientation information when the site with the largest energy is in the multi-screen.
  • the orientation determining unit 601 may further include: a second orientation presetting unit, configured to pre-set the orientation for the largest N-party venue according to the order of joining, and obtain preset orientation information of the largest N-party venue; a comparison unit, configured to compare energy values of each frequency band of the voice signal of the largest N-party site at each time, to obtain a site with the largest energy in each frequency band at each time; and a third setting unit, configured to use the maximum energy When the site is not in the multi-screen, the orientation information of the site with the largest energy is set according to the preset orientation information.
  • the fourth setting unit is configured to set the maximum energy according to the multi-screen orientation information when the site with the largest energy is in the multi-screen. Location information of the venue.
  • the sending unit 602 may include: a first sending unit 607 and/or a second sending unit 608, where the first sending unit 607 is configured to use the mixed signal and the maximum energy in each frequency band at each time.
  • the orientation information is encoded, and the mixed code stream and the position information stream are respectively obtained, and the mixed code stream and the position information code stream are sent to the conference terminal participating in the conference;
  • the second sending unit 608 is configured to encode the mixed signal to obtain a mixed code stream, and send the mixed code stream and the position information of the site with the largest energy in each frequency band at each time to participate.
  • the venue terminal of the conference Embodiment 3 Referring to FIG. 7, FIG. 7 is a flowchart of a method for playing a voice signal according to the present invention, and the method includes the following steps:
  • Step 701 Acquire a mixing signal of a maximum N-party site and a position information of a site with the largest energy in each frequency band at each time;
  • the location information of the site with the largest energy in the largest N-party site is determined from the location information of the largest N-party site based on the site number.
  • Step 702 According to the correspondence between the auditory space parameter and the orientation information of the playback device, Obtaining an auditory spatial parameter of the playback device corresponding to the orientation information of the site with the highest energy on each frequency band at each time;
  • the auditory spatial parameters of the playback device include a level parameter and a delay parameter.
  • the specific implementation process of step 902 may be: firstly setting a level parameter and a delay parameter corresponding to the azimuth information for the playback device, and acquiring, in step 701, the orientation information of the site with the highest energy in each frequency band at each time. After that, the corresponding relationship between the orientation information set by the playback device and the level parameter and the delay parameter is queried, and the level parameter of the playback device corresponding to the orientation information of the site with the largest energy at each time band is obtained. And delay parameters.
  • the position information of the site with the largest energy in a certain frequency band acquired is the upper left
  • the level parameters and delay parameters of the two speakers can be obtained as follows: 1) Speaker 1 Level parameter in the upper left; 2) Level parameter in the upper left of speaker 2; 3) Delay parameter in the upper left of speaker 1; 4) Delay parameter in the upper left of speaker 2.
  • Step 703 Adjust the mixing signal by using the auditory space parameter of the playing device to play the adjusted mixing signal.
  • the time-frequency conversion of the mixed signal is first performed, and the mixed signal in the time domain is converted into the mixed signal in the frequency domain, and the orientation information corresponding to the site with the largest energy in each frequency band is obtained.
  • the level and delay of the mixing signal in the frequency domain are adjusted by using the auditory spatial parameters of the playing device in each frequency band.
  • Figure 8 and Figure 8 for the adjustment of the auditory space parameters of the playback device in each frequency band.
  • FIG. 9 is a structural diagram of a playback apparatus for a voice signal according to the present invention.
  • the apparatus includes an acquisition unit 901, a spatial parameter obtaining unit 902, and an adjustment unit 903.
  • the internal structure and connection relationship will be further described below in conjunction with the working principle of the device.
  • the obtaining unit 901 is configured to acquire a mixing signal of a maximum N-party venue and each frequency band at each moment The orientation information of the site with the largest energy;
  • the spatial parameter obtaining unit 902 is configured to obtain, according to the correspondence between the auditory spatial parameter and the orientation information of the playback device, the auditory space of the playback device corresponding to the orientation information of the site with the largest energy in each frequency band at each time.
  • the adjusting unit 903 is configured to adjust the mixed signal by using an auditory space parameter of the playing device, so as to play the adjusted mixed signal.
  • the obtaining unit 901 may include:
  • a first receiving unit 904 configured to receive a mixed code stream and a position information stream
  • the first decoding unit 905 is configured to decode the mixed code stream and the azimuth information code stream to obtain the mixed signal and the orientation information of the site with the largest energy in each frequency band at each time.
  • the first receiving unit 904 may be replaced by a second receiving unit, configured to receive the mixed code stream and the orientation information of the site with the largest energy in each frequency band at each time; the first decoding unit 905 may be replaced with the second decoding. And a unit, configured to decode the mixed code stream to obtain the mixed signal.
  • the obtaining unit 901 may further include a first receiving unit, a first decoding unit, and a second receiving unit, and a second decoding unit.
  • the spatial parameter obtaining unit 902 may include:
  • the auditory spatial parameter preset unit 906 is configured to preset a level parameter and a delay parameter corresponding to the orientation information for the playback device;
  • the query unit 907 is configured to query a correspondence between the orientation information and the level parameter and the delay parameter, and obtain a level parameter corresponding to the orientation information of the site with the largest energy in each frequency band at each moment. Delay parameter.
  • Fig. 9 does not define a complete structural diagram of a playback apparatus for a voice signal, but merely highlights the part involved in the inventive aspect of the present invention. It will be clear to those skilled in the art that the playback device of the voice signal should also include a player, and the adjusted mix signal output by the adjustment unit 903 is used as an input signal of the player. The player plays the adjusted mix signal.
  • the orientation information is set in advance for all the sites participating in the conference, and in the largest N-party conference site, the orientation of the site with the largest energy in each frequency band is determined. Information that transmits the orientation information along with the mixing signal.
  • the spatial parameters of each playback device at the playback end are obtained, and the spatial parameters of the playback device are used to adjust the mixing signal, which will be adjusted.
  • the auditory space of the sound source can be reconstructed in the venue, so that the sound of the largest N-party venue has a spatial stereoscopic feeling during playback, and the user can clearly understand the sound of each of the largest N-party venues, and further increases the sound.
  • the user's experience of the spot experience is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, buthepta, a spatial stereoscopic feeling during playback, and the user can clearly understand the sound of each of the largest N-party venues, and further increases the sound.
  • the orientation information of the site with the largest energy will change accordingly with the change of the orientation of the site in the multi-picture, so that the orientation of the source is made when the voice signal is played.
  • the orientation of the images is consistent, further increasing the user's experience of the presence experience.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Telephonic Communication Services (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention porte sur un procédé et un dispositif de traitement et de reproduction de signaux vocaux, ledit procédé de traitement comprenant : selon des informations d'emplacement réglées pour des salles de conférence participant à la conférence, la détermination des informations d'emplacement de la salle de conférence ayant l'énergie maximale à chaque instant et dans chaque bande de fréquence parmi les salles de conférence de N correspondants au maximum; la transmission des signaux vocaux mélangés des salles de conférence de N correspondants au maximum et des informations d'emplacement de la salle de conférence ayant l'énergie maximale à chaque instant et dans chaque bande de fréquences à des terminaux dans les salles de conférence participant à la conférence. Le procédé de reproduction comprend : l'obtention des signaux vocaux mélangés et des informations d'emplacement de la salle de conférence ayant l'énergie maximale dans chaque bande de fréquence; selon les correspondances entre des paramètres spatiaux auditifs d'un dispositif de reproduction et des informations d'emplacement, l'obtention des paramètres spatiaux auditifs du dispositif de reproduction correspondant aux informations d'emplacement de la salle de conférence ayant l'énergie maximale dans chaque bande de fréquence; l'ajustement desdits signaux vocaux mélangés par utilisation des paramètres spatiaux auditifs du dispositif de reproduction; et la reproduction des signaux vocaux mélangés après ajustement. Selon le mode de réalisation de la présente invention, l'effet auditif spatial de la visioconférence est amélioré.
PCT/CN2010/070491 2009-02-19 2010-02-03 Procédé et dispositif de traitement et de reproduction de signaux vocaux WO2010094219A1 (fr)

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