CN112929596B - Be absorbed in intelligent flat board of network meeting - Google Patents
Be absorbed in intelligent flat board of network meeting Download PDFInfo
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to an intelligent tablet focused on a network conference, which comprises: the intelligent control system comprises a video acquisition module, an audio acquisition module, a wireless communication module and a central control module, wherein the central control module is arranged in the intelligent panel and is respectively connected with the video acquisition module, the audio acquisition module and the wireless communication module so as to adjust the working states of all the parts. The invention adjusts the image definition during video communication through the real-time network speed, when the real-time network speed is too low, the central control module controls the wireless communication module to only transmit audio and not transmit video in the communication process, and enhances the audio stability in the communication conference by reducing the video definition or abandoning the video information.
Description
Technical Field
The invention relates to the technical field of tablet computers, in particular to an intelligent tablet dedicated to a network conference.
Background
The tablet personal computer is also called a portable computer, is a small-sized and portable personal computer, and takes a touch screen as basic input equipment. It possesses a touch screen, also known as digitizer technology, that allows a user to work with a stylus or digitizer rather than a traditional keyboard or mouse. The user may enter the input through built-in handwriting recognition, on-screen soft keyboard, voice recognition, or a real keyboard.
The video conference service is a multimedia communication means, and utilizes television equipment and a communication network to hold a conference, so that the interactive functions of images, voice and data between two places or more can be realized simultaneously. The videoconference service generally consists of video terminal equipment, a transmission network, and a Multipoint Control Unit (MCU). The video terminal equipment mainly comprises video input/output equipment, audio input/output equipment, a video coder-decoder, an audio coder-decoder, information communication equipment, multiplexing/signal branching equipment and the like. The basic function of the video terminal equipment is to compress and encode the image signal shot by the local camera and the sound signal picked up by the microphone, and then send the compressed and encoded image signal and the sound signal to a transmission network so as to transmit the compressed and encoded image signal and the sound signal to a distant meeting place; meanwhile, digital signals transmitted from a distant place are received, and are restored into analog images and sound signals after being decoded.
Influenced by epidemic situations, the network office mode is rapidly developed within one year, the video conference gradually replaces the traditional on-the-spot conference, and the problems of poor video conference network, video interruption, voice distortion and the like frequently occur under the current existing equipment, so that the video conference progress is influenced.
Disclosure of Invention
Therefore, the invention provides the intelligent tablet dedicated to the network conference, which is used for overcoming the problem of audio distortion and fuzziness in the video conference in the prior art.
To achieve the above object, the present invention provides an intelligent tablet dedicated to web conferences, comprising:
the video acquisition module is an intelligent flat plate with a camera device;
the audio acquisition module is an intelligent tablet with a sound receiving device;
the wireless communication module is an intelligent flat signal receiving device;
the central control module is arranged in the intelligent panel, is respectively connected with the video acquisition module, the audio acquisition module and the wireless communication module, and is used for adjusting the working states of all the components;
the central control module adjusts the image definition during video communication according to the real-time network speed, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process when the real-time network speed is too low;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module extracts an audio loudness value in the acquired audio information and adjusts the audio loudness value to enable the audio loudness value to be in a reasonable range, and the central control module adjusts a direct sound value, a reflected sound value and a reverberant sound value in the acquired audio information according to the adjusted audio loudness value;
the central control module calculates the definition of the adjusted audio information and compares the definition with a preset definition parameter, and when the definition of the audio information is qualified, the central control module controls the wireless communication module to transmit the audio information; and when the definition is unqualified, the central control module calculates the ratio of the direct sound loudness, the ratio of the reflected sound loudness and the ratio of the reverberant sound loudness, and adjusts the audio information according to the magnitude relation of the three ratios.
Further, the central control module is provided with a network speed value standard matrix A0 and an image definition matrix B0;
for the standard wire speed value matrix a0, a0(a1, a2, A3), wherein a1 is a first preset standard wire speed value, a12 is a second preset standard wire speed value, A3 is a third preset standard wire speed value, a1 < a2 < A3;
for the image sharpness matrix B0, B0(B1, B2, B3), where B1 is the first preset image sharpness, B2 is the second preset image sharpness, B3 is the third preset image sharpness, B1 < B2 < B3;
when the intelligent tablet is adopted for video conference, the wireless communication module monitors the real-time network speed A and transmits the detection result to the central control module, and the central control module compares the A with the numerical value in the standard network speed value matrix A0:
when A is not more than A1, the central control module judges that the network speed is too low, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process;
when A is greater than A1 and less than or equal to A2, the central control module judges that the network speed is low, and controls the wireless communication module to select the first preset image definition B1 for video communication in the communication process;
when A is more than A2 and less than or equal to A3, the central control module judges that the network speed is moderate, and controls the wireless communication module to select the second preset image definition B2 in the communication process to carry out video communication;
and when A is more than A3, the central control module judges that the network speed is higher, and controls the wireless communication module to select a third preset image definition B3 in the communication process to carry out video communication.
Furthermore, a sound detection parameter matrix C0, an audio loudness value increasing parameter C1 and an audio loudness value decreasing parameter C2 are arranged in the central control module;
for the acoustic detection parameter matrix C0, C0(C1, C2), where C1 is a first preset audio response value, C2 is a second preset audio response value, and C1 < C2;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module integrates the audio information to generate an audio matrix E1(E11, E12, E13 and E14), wherein E11 is an audio response value, E12 is a direct sound value, E13 is a reflected sound value, and E14 is a reverberant sound value;
the central control module compares the E11 with internal parameters of an acoustic detection parameter matrix C0, and adjusts an audio response value E11 according to a comparison result, wherein:
when E11 is not more than C1, the central control module judges that the acquired audio loudness value is too low, the central control module increases the audio loudness value to E11x, and E11x is (C1-E11) x C1+ E11;
when C1 is larger than E11 and is not larger than C2, the central control module judges that the collected audio loudness value is in a reasonable range, and the central control module does not adjust the audio loudness value;
when E11 is larger than C2, the central control module judges that the collected audio loudness value is too high, and reduces the audio loudness value to E11x, wherein E11x is E11- (E11-C2) multiplied by C2.
Further, when the central control module adjusts E11 to E11x, the central control module compares E11x with internal parameters of an acoustic detection parameter matrix C0, when C1 is more than E11x and is less than or equal to C2, the central control module judges that the acquired audio loudness value is in a reasonable range, and when E11x is not in the range of C1-C2, the central control module repeats the audio loudness value adjusting operation until C1 is more than E11x and is less than or equal to C2;
when the audio loudness value is in a reasonable range, the central control module adjusts the direct sound value to be E12x, the reflected sound value to be E13x and the reverberant sound value to be E14x according to the adjusted audio loudness value E11x, and arranges the adjusted data to generate a new audio matrix E1' (E11x, E12x, E13x and E14 x);
an audio definition parameter F is arranged in the central control module, the central control module calculates the definition Fz of an audio matrix E1', the Fz is E11x xf 1+ E12x xf 2+ E13x xf 3+ E14x xf 4, wherein F1 is an audio loudness value-to-definition compensation parameter, F2 is a direct sound value-to-definition compensation parameter, F3 is a reflected sound value-to-definition compensation parameter, and F4 is a reverberant sound value-to-definition compensation parameter.
Further, be equipped with the meeting scene of predetermineeing in the well accuse module, include, seal scene H1, half seal scene H2 and spacious scene H3, when adopting the intelligence tablet carries out intelligent network meeting, select the meeting scene, each definition compensation parameter f1 under different meeting scenes, f2, f3, f 4:
when the conference is in a closed scene H1, f1 ═ 0.5, f2 ═ 0.2, f3 ═ 0.15, and f4 ═ 0.15;
when the conference is in a semi-closed scene H2, f1 is 0.55, f2 is 0.15, f3 is 0.15, and f4 is 0.15;
when the conference is in an open scene H3, f1 ═ 0.55, f2 ═ 0.1, f3 ═ 0.15, and f4 ═ 0.2;
and determining different definition compensation parameters according to different conference scenes, so that the definition grading capability is enhanced, and the intelligent tablet can clearly and accurately regulate and control the audio.
Further, the audio loudness value increasing parameter c1 and the audio loudness value decreasing parameter c2 are different in different conference scenes,
for the audio loudness value increasing parameter c1, there are: c1 ═ 1.1f1+0.8f2+ f3+1.1f4
For the audio loudness value reduction parameter c2, there are: c2 is 1.1 × c 1.
Further, the central control module compares the definition Fz with the audio definition parameter F:
when Fz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1 'is qualified, and the central control module controls the wireless communication module to transmit the audio matrix E1';
when Fz < F, the central control module judges that the definition of the audio matrix E1' is unqualified.
Further, when the central control module determines that the definition of the audio matrix E1' is not qualified, the central control module calculates a ratio of direct sound loudness to specific value L1, a ratio of reflected sound loudness to specific value L2, and a ratio of reverberant sound loudness to specific value L3, where L1 is E12x/E11x, L2 is E13x/E11x, and L3 is E14x/E11 x;
a direct sound ratio parameter G1, a reflected sound ratio parameter G2 and a reverberant sound ratio parameter G3 are arranged in the central control module; when the central control module judges that the definition of the audio matrix E1' is qualified, L1 is more than or equal to G1, L2 is more than or equal to G2, and L3 is more than or equal to G3;
the central control module sequences the ratio of the direct sound loudness L1, the ratio of the reflected sound loudness L2 and the ratio of the reverberant sound loudness L3, and adjusts the direct sound value E12x, the reflected sound value E13x and the reverberant sound value E14x according to the sequencing result.
Further, when L1 is larger than or equal to L2 is larger than or equal to L3 or L1 is larger than or equal to L3 is larger than or equal to L2, the central control module compares L1 with the direct sound ratio parameter G1, wherein:
when L1 is less than G1, the central control module judges that the direct sound value is too low, increases the direct sound value to E12x ', E12x ═ E12x × (G1/L1), adjusts the audio loudness value to E11 x' according to E12x ', and substitutes the adjusted audio loudness value E11 x' and the direct sound value E12x 'into E1' to obtain a new audio matrix E1a (E11x ', E12 x', E13x and E14 x); the central control module calculates the definition Faz of the audio matrix E1a, the Faz is compared with the audio definition parameter F, and when the Faz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1' is qualified; and when the Faz is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Faz is more than or equal to F.
Further, when L1 is larger than or equal to G1, the central control module judges that the direct sound value is qualified, the central control module compares the reflected sound loudness ratio value L2 with the reflected sound ratio parameter G2 and compares the reverberant sound loudness ratio value L3 with the reverberant sound ratio parameter G3;
when L2 is larger than or equal to G2, the central control module judges that the reflected sound value is too high, and reduces the reflected sound value to E13 x', E13x ═ E13x × (G2/L2); the central control module recalculates the reflected sound loudness ratio value L2 'and compares L2' with the reflected sound ratio parameter G2, and when L2 'is more than or equal to G2, the reflected sound value reducing operation is repeated until L2' is less than G2;
when L3 is larger than or equal to G3, the central control module judges that the reverberant sound value is too high, and reduces the reverberant sound value to E14 x', E14x × (E14 x × (G3/L3); and the central control module recalculates the reverberant sound volume ratio value L3 'and compares L3' with the reverberant sound ratio parameter G3, and when L3 'is more than or equal to G3, the reverberant sound value reducing operation is repeated until L3' is less than G3.
Further, when L1 ≧ G1, L2 '< G2, and L3' < G3, the central control module determines that the direct sound value E12x, the reflected sound value E13x ', and the reverberant sound value E14 x' are qualified, the central control module calculates the audio loudness value E11z according to E12x, E13x ', and E14 x', the central control module integrates E11z, E12x, E13x ', and E14 x', and generates a new audio matrix E1b (E11z, E12x, E13x ', E14 x'), and the central control module controls the wireless communication module to transmit the audio matrix E1 b;
when L2 is larger than L1 or L3 is larger than L1, the central control module determines that the ratio of the direct sound volume is too low, and the central control module increases the direct sound volume to E12 b;
when L2 > L1 and L3 ≦ L1, E12b ═ E12x + E12x × (L2/L1);
when L3 > L1 and L2 ≦ L1, E12b ═ E12x + E12x × (L3/L1);
when L2 > L1 and L3 > L1, E12b ═ E12x + E12x × (L2/L1) × (L3/L1).
Further, when the central control module increases the direct sound value to E12b, the central control module calculates a direct sound loudness ratio value L1b, the central control module compares L1b with a reflected sound loudness ratio value L2 and a reverberant sound loudness ratio value L3, and when L2 is greater than L1b or L3 is greater than L1b, the operation of increasing the direct sound value according to the reflected sound loudness ratio value and the reverberant sound loudness ratio value is repeated until L2 is equal to or less than L1 and L3 is equal to or less than L1;
when L2 is not less than L1 and L3 is not less than L1, the central control module adjusts the audio loudness value to E11b according to E12b, integrates E11b, E12b, E13x and E14x to generate a new audio matrix E1c (E11b, E12b, E13x and E14x), calculates the definition Fc of the audio matrix E1c and compares the definition Fc with an audio definition parameter F, and when Fc is not less than F, the central control module judges that the definition of the audio matrix E1c is qualified, and controls the wireless communication module to transmit the audio matrix E1 c; and when the Fc is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Fc is more than or equal to F.
Compared with the prior art, the invention has the advantages that the central control module adjusts the image definition during video communication according to the real-time network speed, when the real-time network speed is too low, the central control module controls the wireless communication module to only transmit audio and not transmit video during communication, and the stability of the audio in a communication conference is enhanced by reducing the video definition or abandoning video information, thereby solving the problems of poor conference network and voice distortion during the conference.
Particularly, when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module extracts audio loudness values in the acquired audio information and adjusts the audio loudness values to enable the audio loudness values to be in a reasonable range, the central control module adjusts direct sound values, reflected sound values and reverberant sound values in the acquired audio information according to the adjusted audio loudness values, the central control module adjusts the audio loudness values to a standard range and enables the audio information to be corrected to the standard range according to the loudness values, convenience is provided for next-step audio adjustment, and the problem of audio distortion ambiguity in a video conference is further solved.
Further, the central control module calculates the definition of the adjusted audio information and compares the definition with a preset definition parameter, and when the definition of the audio information is qualified, the central control module controls the wireless communication module to transmit the audio information; when the definition is unqualified, the central control module calculates the ratio of the direct sound loudness, the ratio of the reflected sound loudness and the ratio of the reverberant sound loudness, and adjusts the audio information according to the size relationship of the three ratios, so that the problem of fuzzy audio distortion in the video conference is further solved.
Furthermore, different definition compensation parameters are determined according to different conference scenes, so that the grading capability of definition is enhanced, the intelligent panel can clearly and accurately regulate and control audio, meanwhile, as can be understood in the field, a preset loudness difference value is intentionally generated in the process of increasing the loudness value, and on the premise that the real-time loudness value is smaller than the standard preset loudness value, the preset loudness difference value is close to the first preset loudness value as much as possible, so that the generation of acoustic distortion is avoided; meanwhile, different audio loudness value compensation parameters are determined in different conference scenes, so that the intelligent tablet can clearly and accurately regulate and control audio, and the audio definition in the conference process is enhanced.
Drawings
Fig. 1 is a schematic diagram of an audio adjusting process of the smart tablet according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic diagram illustrating an audio adjusting process of an intelligent tablet according to the present invention, the present invention provides an intelligent tablet dedicated to a web conference, including:
the video acquisition module is an intelligent flat plate with a camera device;
the audio acquisition module is an intelligent tablet with a sound receiving device;
the wireless communication module is an intelligent flat signal receiving device;
the central control module is arranged in the intelligent panel, is respectively connected with the video acquisition module, the audio acquisition module and the wireless communication module, and is used for adjusting the working states of all the components;
the central control module adjusts the image definition during video communication according to the real-time network speed, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process when the real-time network speed is too low;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module extracts an audio loudness value in the acquired audio information and adjusts the audio loudness value to enable the audio loudness value to be in a reasonable range, and the central control module adjusts a direct sound value, a reflected sound value and a reverberant sound value in the acquired audio information according to the adjusted audio loudness value;
the central control module calculates the definition of the adjusted audio information and compares the definition with a preset definition parameter, and when the definition of the audio information is qualified, the central control module controls the wireless communication module to transmit the audio information; and when the definition is unqualified, the central control module calculates the ratio of the direct sound loudness, the ratio of the reflected sound loudness and the ratio of the reverberant sound loudness, and adjusts the audio information according to the magnitude relation of the three ratios.
The central control module is provided with a network speed value standard matrix A0 and an image definition matrix B0;
for the standard wire speed value matrix a0, a0(a1, a2, A3), wherein a1 is a first preset standard wire speed value, a12 is a second preset standard wire speed value, A3 is a third preset standard wire speed value, a1 < a2 < A3;
for the image sharpness matrix B0, B0(B1, B2, B3), where B1 is the first preset image sharpness, B2 is the second preset image sharpness, B3 is the third preset image sharpness, B1 < B2 < B3.
Specifically, when the intelligent tablet is used for a video conference, the wireless communication module monitors a real-time network speed A and transmits a detection result to the central control module, and the central control module compares the A with a value in a standard network speed value matrix A0:
when A is not more than A1, the central control module judges that the network speed is too low, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process;
when A is greater than A1 and less than or equal to A2, the central control module judges that the network speed is low, and controls the wireless communication module to select the first preset image definition B1 for video communication in the communication process;
when A is more than A2 and less than or equal to A3, the central control module judges that the network speed is moderate, and controls the wireless communication module to select the second preset image definition B2 in the communication process to carry out video communication;
when A is larger than A3, the central control module judges that the network speed is higher, and controls the wireless communication module to select a third preset image definition B3 in the communication process to carry out video communication;
a sound detection parameter matrix C0, an audio loudness value increasing parameter C1 and an audio loudness value decreasing parameter C2 are arranged in the central control module;
for the acoustic detection parameter matrix C0, C0(C1, C2), where C1 is a first preset audio response value, C2 is a second preset audio response value, and C1 < C2;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module integrates the audio information to generate an audio matrix E1(E11, E12, E13 and E14), wherein E11 is an audio response value, E12 is a direct sound value, E13 is a reflected sound value, and E14 is a reverberant sound value.
Specifically, the central control module compares the E11 with the parameters in the acoustic detection parameter matrix C0, and adjusts the audio response value E11 according to the comparison result, wherein:
when E11 is not more than C1, the central control module judges that the acquired audio loudness value is too low, the central control module increases the audio loudness value to E11x, and E11x is (C1-E11) x C1+ E11;
when C1 is larger than E11 and is not larger than C2, the central control module judges that the collected audio loudness value is in a reasonable range, and the central control module does not adjust the audio loudness value;
when E11 is larger than C2, the central control module judges that the collected audio loudness value is too high, the central control module reduces the audio loudness value to E11x, and E11x is E11- (E11-C2) x C2;
when the central control module adjusts E11 to E11x, the central control module compares E11x with parameters in an acoustic detection parameter matrix C0, when C1 is larger than E11x and is equal to or smaller than C2, the central control module judges that the acquired audio loudness value is in a reasonable range, and when E11x is not in the range of C1-C2, the central control module repeats the audio loudness value adjusting operation until C1 is larger than E11x and is equal to or smaller than C2;
when the audio loudness value is in a reasonable range, the central control module adjusts the direct sound value to be E12x, the reflected sound value to be E13x and the reverberant sound value to be E14x according to the adjusted audio loudness value E11x, and arranges the adjusted data to generate a new audio matrix E1' (E11x, E12x, E13x and E14 x);
an audio definition parameter F is arranged in the central control module, the central control module calculates the definition Fz of an audio matrix E1', the Fz is E11x xf 1+ E12x xf 2+ E13x xf 3+ E14x xf 4, wherein F1 is an audio loudness value-to-definition compensation parameter, F2 is a direct sound value-to-definition compensation parameter, F3 is a reflected sound value-to-definition compensation parameter, and F4 is a reverberant sound value-to-definition compensation parameter.
The intelligent tablet computer is characterized in that a preset conference scene is arranged in the central control module, and comprises a closed scene H1, a semi-closed scene H2 and an open scene H3, when the intelligent tablet computer is adopted to carry out an intelligent network conference, the conference scene is selected, and definition compensation parameters f1, f2, f3 and f4 in different conference scenes are as follows:
when the conference is in a closed scene H1, f1 ═ 0.5, f2 ═ 0.2, f3 ═ 0.15, and f4 ═ 0.15;
when the conference is in a semi-closed scene H2, f1 is 0.55, f2 is 0.15, f3 is 0.15, and f4 is 0.15;
when the conference is in an open scene H3, f1 ═ 0.55, f2 ═ 0.1, f3 ═ 0.15, and f4 ═ 0.2;
wherein, the closed scene H1 means that the area of the room for the network conference is less than 15 square meters; the semi-closed scene H2 indicates that the area of a room for carrying out the network conference exceeds 15 square meters and is less than 25 square meters; open scene H3 indicates that the area of the room for the netmeeting exceeds 25 square meters;
determining different definition compensation parameters according to different conference scenes, so that the definition grading capability is enhanced, and the intelligent tablet can clearly and accurately regulate and control audio;
specifically, the audio loudness value increasing parameter c1 and the audio loudness value decreasing parameter c2 are different in different conference scenes,
for the audio loudness value increasing parameter c1, there are: c1 ═ 1.1f1+0.8f2+ f3+1.1f4
For the audio loudness value reduction parameter c2, there are: c2 ═ 1.1 xc 1
As can be understood in the art, in the process of increasing the loudness value, a preset loudness difference value is intentionally generated, and on the premise that the real-time loudness value is smaller than the standard preset audio loudness value, the real-time loudness difference value is as close as possible to the first preset audio loudness value, so as to avoid generating acoustic distortion; meanwhile, different audio loudness value compensation parameters are determined in different conference scenes, so that the intelligent tablet can clearly and accurately regulate and control audio, and the audio definition in the conference process is enhanced.
Specifically, the central control module compares the definition Fz with the audio definition parameter F:
when Fz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1 'is qualified, and the central control module controls the wireless communication module to transmit the audio matrix E1';
when Fz is less than F, the central control module judges that the definition of the audio matrix E1' is unqualified;
when the central control module judges that the definition of the audio matrix E1' is unqualified, the central control module calculates a ratio of direct sound loudness to specific value L1, reflected sound loudness to specific value L2 and reverberant sound loudness to specific value L3, wherein L1 is E12x/E11x, L2 is E13x/E11x, and L3 is E14x/E11 x;
a direct sound ratio parameter G1, a reflected sound ratio parameter G2 and a reverberant sound ratio parameter G3 are arranged in the central control module; when the central control module judges that the definition of the audio matrix E1' is qualified, L1 is more than or equal to G1, L2 is less than G2, and L3 is less than G3.
Specifically, the central control module sequences a direct sound loudness ratio value L1, a reflected sound loudness ratio value L2 and a reverberant sound loudness ratio value L3, and adjusts a direct sound value E12x, a reflected sound value E13x and a reverberant sound value E14x according to a sequencing result;
when L1 is larger than or equal to L2 is larger than or equal to L3 or L1 is larger than or equal to L3 is larger than or equal to L2, the central control module compares L1 with a direct sound ratio parameter G1, wherein:
when L1 is less than G1, the central control module judges that the direct sound value is too low, increases the direct sound value to E12x ', E12x ═ E12x × (G1/L1), adjusts the audio loudness value to E11 x' according to E12x ', and substitutes the adjusted audio loudness value E11 x' and the direct sound value E12x 'into E1' to obtain a new audio matrix E1a (E11x ', E12 x', E13x and E14 x); the central control module calculates the definition Faz of the audio matrix E1a, the Faz is compared with the audio definition parameter F, and when the Faz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1' is qualified; and when the Faz is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Faz is more than or equal to F.
Specifically, when L1 is larger than or equal to G1, the central control module judges that the direct sound value is qualified, and compares the reflected sound loudness ratio L2 with the reflected sound ratio parameter G2 and compares the reverberant sound loudness ratio L3 with the reverberant sound ratio parameter G3;
when L2 is larger than or equal to G2, the central control module judges that the reflected sound value is too high, and reduces the reflected sound value to E13 x', E13x ═ E13x × (G2/L2); the central control module recalculates the reflected sound loudness ratio value L2 'and compares L2' with the reflected sound ratio parameter G2, and when L2 'is more than or equal to G2, the reflected sound value reducing operation is repeated until L2' is less than G2;
when L3 is larger than or equal to G3, the central control module judges that the reverberant sound value is too high, and reduces the reverberant sound value to E14 x', E14x × (E14 x × (G3/L3); and the central control module recalculates the reverberant sound volume ratio value L3 'and compares L3' with the reverberant sound ratio parameter G3, and when L3 'is more than or equal to G3, the reverberant sound value reducing operation is repeated until L3' is less than G3.
Specifically, when L1 ≧ G1, L2 '< G2, and L3' < G3, the center control module determines that the direct sound value E12x, the reflected sound value E13x ', and the reverberant sound value E14 x' are qualified, the center control module calculates the audio loudness value E11z according to E12x, E13x ', and E14 x', the center control module integrates E11z, E12x, E13x ', and E14 x', and generates a new audio matrix E1b (E11z, E12x, E13x ', E14 x'), and the center control module controls the wireless communication module to transmit the audio matrix E1 b.
Specifically, when L2 > L1 or L3 > L1, the central control module determines that the ratio of the direct sound volume is too low, and the central control module increases the direct sound volume to E12 b;
when L2 > L1 and L3 ≦ L1, E12b ═ E12x + E12x × (L2/L1);
when L3 > L1 and L2 ≦ L1, E12b ═ E12x + E12x × (L3/L1);
when L2 > L1 and L3 > L1, E12b ═ E12x + E12x × (L2/L1) × (L3/L1);
when the central control module increases the direct sound value to E12b, the central control module calculates a direct sound loudness ratio L1b, the central control module compares L1b with a reflected sound loudness ratio L2 and a reverberant sound loudness ratio L3, and when L2 is more than L1b or L3 is more than L1b, the operation of increasing the direct sound value according to the reflected sound loudness ratio and the reverberant sound loudness ratio is repeated until L2 is less than or equal to L1 and L3 is less than or equal to L1.
Specifically, when L2 is not less than L1 and L3 is not less than L1, the central control module adjusts the audio loudness value to E11b according to E12b, integrates E11b, E12b, E13x and E14x to generate a new audio matrix E1c (E11b, E12b, E13x and E14x), calculates the definition Fc of the audio matrix E1c and compares the definition Fc with the audio definition parameter F, and when Fc is not less than F, the central control module determines that the definition of the audio matrix E1c is qualified, and controls the wireless communication module to transmit the audio matrix E1 c; and when the Fc is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Fc is more than or equal to F.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. An intelligent tablet dedicated to web conferencing, comprising:
the video acquisition module is an intelligent flat plate with a camera device;
the audio acquisition module is an intelligent tablet with a sound receiving device;
the wireless communication module is an intelligent flat signal receiving device;
the central control module is arranged in the intelligent panel, is respectively connected with the video acquisition module, the audio acquisition module and the wireless communication module, and is used for adjusting the working states of all the components;
the central control module adjusts the image definition during video communication according to the real-time network speed, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process when the real-time network speed is too low;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module extracts an audio loudness value in the acquired audio information and adjusts the audio loudness value to enable the audio loudness value to be in a reasonable range, and the central control module adjusts a direct sound value, a reflected sound value and a reverberant sound value in the acquired audio information according to the adjusted audio loudness value;
the central control module calculates the definition of the adjusted audio information and compares the definition with a preset definition parameter, and when the definition of the audio information is qualified, the central control module controls the wireless communication module to transmit the audio information; when the definition is unqualified, the central control module calculates a direct sound volume ratio, a reflected sound volume ratio and a reverberant sound volume ratio, and adjusts the audio information according to the size relationship of the three ratios;
preset conference scenes are arranged in the central control module and comprise a closed scene H1, a semi-closed scene H2 and an open scene H3;
the central control module is also provided with an audio loudness value versus definition compensation parameter f1, a direct sound value versus definition compensation parameter f2, a reflected sound value versus definition compensation parameter f3, a reverberant sound value versus definition compensation parameter f4, an audio loudness value increasing parameter c1 and an audio loudness value decreasing parameter c 2;
for the audio loudness value increasing parameter c1, there are: c1 ═ 1.1f1+0.8f2+ f3+1.1f4
For the audio loudness value reduction parameter c2, there are: c2 is 1.1 × c 1;
the central control module determines different definition compensation parameters according to different conference scenes, so that the definition grading capability is enhanced, and the intelligent panel can clearly and accurately regulate and control audio; meanwhile, different audio loudness value compensation parameters are determined in different conference scenes, so that the intelligent tablet can clearly and accurately regulate and control audio, and the audio definition in the conference process is enhanced.
2. The intelligent tablet of claim 1, wherein the central control module is provided with a net speed value standard matrix A0 and an image definition matrix B0;
for the standard wire speed value matrix a0, a0(a1, a2, A3), wherein a1 is a first preset standard wire speed value, a12 is a second preset standard wire speed value, A3 is a third preset standard wire speed value, a1 < a2 < A3;
for the image sharpness matrix B0, B0(B1, B2, B3), where B1 is the first preset image sharpness, B2 is the second preset image sharpness, B3 is the third preset image sharpness, B1 < B2 < B3;
when the intelligent tablet is adopted for video conference, the wireless communication module monitors the real-time network speed A and transmits the detection result to the central control module, and the central control module compares the A with the numerical value in the standard network speed value matrix A0:
when A is not more than A1, the central control module judges that the network speed is too low, and controls the wireless communication module to only carry out audio transmission and not carry out video transmission in the communication process;
when A is greater than A1 and less than or equal to A2, the central control module judges that the network speed is low, and controls the wireless communication module to select the first preset image definition B1 for video communication in the communication process;
when A is more than A2 and less than or equal to A3, the central control module judges that the network speed is moderate, and controls the wireless communication module to select the second preset image definition B2 in the communication process to carry out video communication;
and when A is more than A3, the central control module judges that the network speed is higher, and controls the wireless communication module to select a third preset image definition B3 in the communication process to carry out video communication.
3. The intelligent tablet focused on network conferences according to claim 2, characterized in that a sound detection parameter matrix C0 is arranged in the central control module,
for the acoustic detection parameter matrix C0, C0(C1, C2), where C1 is a first preset audio response value, C2 is a second preset audio response value, and C1 < C2;
when the intelligent tablet is used for video communication, the audio acquisition module acquires audio information and transmits the acquired information to the central control module, the central control module integrates the audio information to generate an audio matrix E1(E11, E12, E13 and E14), wherein E11 is an audio response value, E12 is a direct sound value, E13 is a reflected sound value, and E14 is a reverberant sound value;
the central control module compares the E11 with internal parameters of an acoustic detection parameter matrix C0, and adjusts an audio response value E11 according to a comparison result, wherein:
when E11 is less than or equal to C1, the central control module judges that the acquired audio loudness value is too low, and the central control module increases the audio loudness value to E11x, wherein E11x is (C1-E11) x C1+ E11;
when C1 is larger than E11 and is not larger than C2, the central control module judges that the collected audio loudness value is in a reasonable range, and the central control module does not adjust the audio loudness value;
when E11 is greater than C2, the central control module judges that the collected audio loudness value is too high, and reduces the audio loudness value to E11x, wherein E11x is E11- (E11-C2) x C2;
when the central control module adjusts E11 to E11x, the central control module compares E11x with parameters in an acoustic detection parameter matrix C0, when C1 is larger than E11x and is equal to or smaller than C2, the central control module judges that the acquired audio loudness value is in a reasonable range, and when E11x is not in the range of C1-C2, the central control module repeats the audio loudness value adjusting operation until C1 is larger than E11x and is equal to or smaller than C2;
when the audio loudness value is in a reasonable range, the central control module adjusts the direct sound value to E12x, the reflected sound value to E13x and the reverberant sound value to E14x according to the adjusted audio loudness value E11x, and arranges the adjusted data to generate a new audio matrix E1' (E11x, E12x, E13x and E14 x).
4. The intelligent tablet of claim 3, wherein the central module has an audio definition parameter F, and the central module calculates the definition Fz of the audio matrix E1', and sets Fz to E11x xf 1+ E12x xf 2+ E13x xf 3+ E14x xf 4,
the central control module compares the definition Fz with the audio definition parameter F:
when Fz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1 'is qualified, and the central control module controls the wireless communication module to transmit the audio matrix E1';
when Fz < F, the central control module judges that the definition of the audio matrix E1' is unqualified.
5. The tablet of claim 4, wherein when the tablet is used for intelligent network conference, a conference scene is selected, and the definition compensation parameters f1, f2, f3 and f4 in different conference scenes are:
when the conference is in a closed scene H1, f1 ═ 0.5, f2 ═ 0.2, f3 ═ 0.15, and f4 ═ 0.15;
when the conference is in a semi-closed scene H2, f1 is 0.55, f2 is 0.15, f3 is 0.15, and f4 is 0.15;
when the conference is in an open scene H3, f1 ═ 0.55, f2 ═ 0.1, f3 ═ 0.15, and f4 ═ 0.2;
and determining different definition compensation parameters according to different conference scenes, so that the definition grading capability is enhanced, and the intelligent tablet can clearly and accurately regulate and control the audio.
6. The smart tablet of claim 5, wherein when the central module determines that the clarity of the audio matrix E1' is not good, the central module calculates a ratio of direct sound loudness L1, a ratio of reflected sound loudness L2, and a ratio of reverberant sound loudness L3, wherein L1 is E12x/E11x, L2 is E13x/E11x, and L3 is E14x/E11 x;
a direct sound ratio parameter G1, a reflected sound ratio parameter G2 and a reverberant sound ratio parameter G3 are arranged in the central control module; when the central control module judges that the definition of the audio matrix E1' is qualified, L1 is more than or equal to G1, L2 is more than or equal to G2, and L3 is more than or equal to G3;
the central control module sequences the ratio of the direct sound loudness L1, the ratio of the reflected sound loudness L2 and the ratio of the reverberant sound loudness L3, and adjusts the direct sound value E12x, the reflected sound value E13x and the reverberant sound value E14x according to the sequencing result.
7. The intelligent tablet of claim 6, wherein the central control module compares L1 with a direct sound ratio parameter G1 when L1 ≧ L2 ≧ L3 or L1 ≧ L3 ≧ L2, wherein:
when L1 is less than G1, the central control module judges that the direct sound value is too low, the central control module increases the direct sound value to E12x ', wherein E12x ' is E12x x (G1/L1), the central control module adjusts the audio loudness value to E11x ' according to E12x ', and the central control module substitutes the adjusted audio loudness value E11x ' and the direct sound value E12x ' into E1 ' to obtain a new audio matrix E1a (E11x ', E12x ', E13x and E14 x); the central control module calculates the definition Faz of the audio matrix E1a and compares the Faz with the audio definition parameter F, and when the Faz is larger than or equal to F, the central control module judges that the definition of the audio matrix E1' is qualified; when the Faz is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Faz is more than or equal to F;
when L1 is larger than or equal to G1, the central control module judges that the direct sound value is qualified, compares the reflected sound loudness ratio value L2 with the reflected sound ratio parameter G2, and compares the reverberant sound loudness ratio value L3 with the reverberant sound ratio parameter G3, wherein,
when L2 is larger than or equal to G2, the central control module judges that the reflected sound value is too high, reduces the reflected sound value to E13 x', and sets E13x ═ E13x × (G2/L2); the central control module recalculates the reflected sound loudness ratio value L2 'and compares L2' with the reflected sound ratio parameter G2, and when L2 'is more than or equal to G2, the reflected sound value reducing operation is repeated until L2' is less than G2;
when L3 is larger than or equal to G3, the central control module judges that the reverberant sound value is too high, the central control module reduces the reverberant sound value to E14 x', and E14x is set to be E14x x (G3/L3); the central control module recalculates the reverberant sound loudness ratio value L3 'and compares L3' with the reverberant sound ratio parameter G3, and when L3 'is more than or equal to G3, the reverberant sound value reducing operation is repeated until L3' is less than G3;
when L1 is more than or equal to G1, L2 '< G2 and L3' < G3, the central control module judges that the direct sound value E12x, the reflected sound value E13x 'and the reverberant sound value E14 x' are qualified, the central control module calculates an audio response value E11z according to E12x, E13x 'and E14 x', the central control module integrates E11z, E12x, E13x 'and E14 x' to generate a new audio matrix E1b (E11z, E12x, E13x ', E14 x'), and the central control module controls the wireless communication module to transmit the audio matrix E1 b.
8. The intelligent tablet of claim 6, wherein when L2 > L1 or L3 > L1, the central module determines that the direct sound volume ratio is too low, and the central module increases the direct sound value to E12 b;
when L2 > L1 and L3 ≦ L1, E12b ═ E12x + E12x × (L2/L1);
when L3 > L1 and L2 ≦ L1, E12b ═ E12x + E12x × (L3/L1);
when L2 > L1 and L3 > L1, E12b ═ E12x + E12x × (L2/L1) × (L3/L1);
when the central control module increases the direct sound value to E12b, the central control module calculates a direct sound loudness ratio value L1b, the central control module compares L1b with a reflected sound loudness ratio value L2 and a reverberant sound loudness ratio value L3, and when L2 is larger than L1b or L3 is larger than L1b, the operation of increasing the direct sound value according to the reflected sound loudness ratio value and the reverberant sound loudness ratio value is repeated until L2 is equal to or smaller than L1 and L3 is equal to or smaller than or equal to L1.
9. The tablet of claim 8, wherein when L2 ≤ L1 and L3 ≤ L1, the console module adjusts the audio loudness value to E11b according to E12b, the console module integrates E11b, E12b, E13x, and E14x to generate a new audio matrix E1c (E11b, E12b, E13x, E14x), the console module calculates the definition Fc of the audio matrix E1c and compares the definition Fc with the audio definition parameter F, and when Fc ≥ F, the console module decides that the definition of the audio matrix E1c is qualified, the console module controls the wireless communication module to transmit the audio matrix E1 c; and when the Fc is less than F, the central control module repeats the operation of increasing the direct sound value according to the direct sound ratio parameter G1 until the Fc is more than or equal to F.
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