CN109246545B - Double-screen audio output method - Google Patents
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- CN109246545B CN109246545B CN201811022273.0A CN201811022273A CN109246545B CN 109246545 B CN109246545 B CN 109246545B CN 201811022273 A CN201811022273 A CN 201811022273A CN 109246545 B CN109246545 B CN 109246545B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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Abstract
The invention provides a double-screen audio output method, which comprises the following steps: 1. the two displays respectively play an audio signal, the delay difference of the audio signal is measured, and the delay is adjusted to ensure that the delay of the two audio signals is equal; 2. the central processing unit is connected with the display, and judges whether the display supports audio output according to the configuration information of the display, so that the number of the displays supporting the audio output is obtained; 3. the central processing unit acquires the placement position of the display; 4. the central processing unit acquires the current video output modes of the two displays; 5. the central processing unit judges the audio output mode according to the number of the connected displays supporting audio output, the placing positions of the displays and the video output mode; 6. and the central processing unit adjusts the content of the audio stream and the buffering of the audio stream according to the audio output mode and then outputs the content and the buffering of the audio stream from the corresponding display interface. The invention can solve the problems of sound interference and output delay, enhance audio output under the condition of double-screen output and improve user experience.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a double-screen audio output method.
Background
Most of the existing multi-screen audio output methods are based on default strategies or user selections, and a loudspeaker of one display is designated as an audio output object. The method can avoid the problems of destructive interference of multi-screen simultaneous sound output and different audio output delays of different displays, wherein the destructive interference of sound can cause large fluctuation of partial spatial frequency response, and the difference of output delays can cause unsynchronization of sound. Although the multi-screen audio output system avoids the problems of interference and the like, because only one loudspeaker of one screen is used as audio output, the sound is possibly small in an environment with a large space, in addition, in the use scene of multi-screen different display, the image and the corresponding audio are not output on the same display screen, and the difference of the sound source and the image position obviously causes discomfort.
In addition, some multi-screen audio output methods are to shield the audio output of the display, and use an independent external device instead, so that not only can enough sound volume be obtained, but also the original spatial characteristics of sound can be restored by flexibly placing the external device. The multi-screen audio output system needs to be provided with independent external playing equipment, and cost is increased invisibly.
Aiming at the problems existing in the output of the two multi-screen audio output methods, the invention designs a double-screen audio output method.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a dual-screen audio output method, which can solve the problems of sound interference and output delay, and can also significantly enhance audio output under the dual-screen output condition and enhance the user experience of multi-screen different display or multi-screen simultaneous display.
The problem of the invention is realized as follows:
a dual-screen audio output method includes the following steps:
step 1, a central processing unit respectively enables two displays to play a section of set audio signals, a microphone connected with the central processing unit is used for measuring the delay difference of the two audio signals, the audio signal playing buffer of the display with smaller delay is adjusted, and the playing time of the two audio signals played by two display interfaces from a loudspeaker of the display is equal;
step 2, the central processing unit is connected with the two displays through the interface of the central processing unit, configuration information of the two displays is obtained, whether the connected displays support audio output or not is judged according to the configuration information, and therefore the number of the connected displays supporting audio output is obtained;
step 3, a user sets the positions of the two displays by himself and inputs the position information of the two displays into a central processing unit, the central processing unit acquires the placing positions of the two displays according to the position information, and the standard placing modes supported by the two displays are horizontally placed side by side and vertically placed side by side;
step 4, the central processing unit obtains the current video output modes of the two displays;
step 5, the central processing unit judges the audio output modes of the two displays according to the number of the connected displays supporting audio output, the placing positions of the displays and the video output mode;
and 6, after the central processing unit adjusts the content of the audio stream and the buffering of the audio stream according to the audio output mode of each display, outputting the adjusted audio stream from the corresponding display interface.
Further, the step 5 specifically includes:
when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, the audio output modes of the two displays are judged to be different-screen modes of a left sound channel and a right sound channel, the left display outputs the left sound channel, the right display outputs the right sound channel, and the playing delay differences of the two displays are the same;
when the number of the displays supporting audio output is 2, the displays are vertically arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, one display is randomly or appointed by a user to output audio;
when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side or vertically arranged side by side, and the current video output modes of the two displays are different-screen display, the audio output modes of the two displays are judged to be the left and right channel same-screen mode, and the two displays respectively output audio corresponding to the respective display contents;
when the number of the displays supporting audio output is 2 and the placing modes of the two displays do not belong to the supported standard placing modes, one display is selected randomly or designated by a user to output audio;
when the number of the displays supporting audio output is 1, no matter how the two displays are placed, and no matter whether the current video output modes of the two displays are different-screen simultaneous display or different-screen different display, the audio is output by the display of one side supporting audio output;
when the number of the displays supporting audio output is 0, no audio is output no matter how the two displays are placed, and no matter whether the current video output mode of the two displays is different-screen same display or different-screen different display.
The invention has the advantages that: the invention judges the audio output mode based on the number of the displays supporting the audio output, the arrangement positions of the displays and the video output mode; when the video output mode is different-screen simultaneous display, the displays are horizontally arranged side by side, then the left display outputs a left sound channel, and the right display outputs a right sound channel; when the video output mode is different-screen different-display, each display outputs sound of a corresponding image, for example, when one display is in ppt display, the display simultaneously plays ppt sound effect, and when the other display is in video call, the display plays far-end voice. The invention can solve the problems of sound interference and output delay, and can obviously enhance the audio output under the condition of double-screen output and improve the user experience of multi-screen different display or multi-screen simultaneous display.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating an implementation of a dual-screen audio output method according to the present invention.
Detailed Description
In order that the invention may be more readily understood, a preferred embodiment thereof will now be described in detail with reference to the accompanying drawings.
Each video output interface of the double-screen audio output method simultaneously supports audio output, and the audio output of different-screen simultaneous display or different-screen different display is adjusted by a software method.
As shown in fig. 1, a dual-screen audio output method of the present invention includes the following steps:
step 1, the central processing unit respectively enables the two displays to play a section of set audio signal, and the section of audio signal is set in advance and used for testing the playing state; the delay difference of two audio signals is measured by a microphone connected with a central processing unit, the audio signal playing buffer of the display with smaller delay is adjusted, so that the playing time of the two audio signals played by two display interfaces from a loudspeaker of the display is equal, and the delay condition of the two displays is adjusted before playing so as to achieve the consistency of sound and image playing when audio and video are played;
step 2, the central processing unit is connected with the two displays through the interface of the central processing unit, configuration information of the two displays is obtained, whether the connected displays support audio output or not is judged according to the configuration information, and therefore the number of the connected displays supporting audio output is obtained, wherein the number of the displays is 0, 1 or 2;
step 3, a user sets the positions of the two displays by himself and inputs the position information of the two displays into a central processing unit, the central processing unit acquires the placing positions of the two displays according to the position information, and the standard placing modes supported by the two displays are horizontally placed side by side and vertically placed side by side;
step 4, the central processing unit obtains the current video output modes of the two displays;
step 5, the central processing unit judges the audio output modes of the two displays according to the number of the connected displays supporting audio output, the placing positions of the displays and the video output mode; the method specifically comprises the following steps:
when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, the audio output modes of the two displays are judged to be different-screen modes of a left sound channel and a right sound channel, the left display outputs the left sound channel, the right display outputs the right sound channel, and the playing delay differences of the two displays are the same;
when the number of the displays supporting audio output is 2, the displays are vertically arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, one display is randomly or appointed by a user to output audio;
when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side or vertically arranged side by side, and the current video output modes of the two displays are different-screen display, the audio output modes of the two displays are judged to be the left and right channel same-screen mode, and the two displays respectively output audio corresponding to the respective display contents;
when the number of the displays supporting audio output is 2 and the placing modes of the two displays do not belong to the supported standard placing modes, one display is selected randomly or designated by a user to output audio;
when the number of the displays supporting audio output is 1, no matter how the two displays are placed, and no matter whether the current video output modes of the two displays are different-screen simultaneous display or different-screen different display, the audio is output by the display of one side supporting audio output;
when the number of the displays supporting audio output is 0, no audio is output no matter how the two displays are placed or no matter whether the current video output modes of the two displays are different-screen same-display or different-screen different-display;
and 6, after the central processing unit adjusts the content of the audio stream and the buffering of the audio stream according to the audio output mode of each display, outputting the adjusted audio stream from the corresponding display interface.
Example 1:
the embodiment belongs to the situation that the number of the displays supporting audio output is 2, the displays are vertically arranged side by side, and the current video output modes of the two displays are different-screen different-display.
The video conference terminal generally supports dual-screen output, one screen displays auxiliary streams such as ppt and video clips, and the other screen displays video conference images in real time. It is common practice to designate a previously accessed display as the party for audio output.
By means of the invention, the system can separate the auxiliary stream audio and the call audio and output the auxiliary stream audio and the call audio from different displays respectively, in this case, the conference participants can not appear in the situation that the sight line is already turned to the display where the auxiliary stream is located, and the sound source is still from the other display when watching the auxiliary stream.
Example 2:
the embodiment belongs to the situation that the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side, and the current video output modes of the two displays are different screens and are displayed simultaneously.
The video conference terminal generally supports double-screen output, and in some scenes, a double-screen splicing method is adopted to stretch images with ultrahigh resolution to two displays with low resolution for display. Their audio output is then typically output from a designated one of the displays or from an audio on-board output port of the conference terminal to an external speaker.
By means of the invention, the system enables the two displays to output the audio frequency of the left and right sound channels respectively, under the condition, the output volume can be obviously improved, and the spatial information of the sound can be restored.
The invention has the following advantages:
the invention judges the audio output mode based on the number of the displays supporting the audio output, the arrangement positions of the displays and the video output mode; when the video output mode is different-screen simultaneous display, the displays are horizontally arranged side by side, then the left display outputs a left sound channel, and the right display outputs a right sound channel; when the video output mode is different-screen different-display, each display outputs sound of a corresponding image, for example, when one display is in ppt display, the display simultaneously plays ppt sound effect, and when the other display is in video call, the display plays far-end voice.
The invention is characterized in that under the conditions that the number of the displays supporting audio output is 2, the displays are vertically arranged side by side, the current video output modes of the two displays are different screens and the same display, the number of the displays supporting audio output is 2, the arrangement modes of the two displays do not belong to the supported standard arrangement mode, and the number of the displays supporting audio output is 1, a loudspeaker of one display is appointed to be used as an audio output object, the problems of sound interference and output delay are solved (the audio signal delay of the two displays is adjusted before playing), under the conditions that the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side, the current video output modes of the two displays are different screens and the same display, the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side or vertically arranged side by side, and the current video output modes of the two displays are different screens and different displays, the two displays (double screens) output corresponding audio, so that the audio output under the condition of double-screen output can be obviously enhanced, and the user experience of multi-screen different display or multi-screen simultaneous display can be improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (1)
1. A dual-screen audio output method is characterized in that: the method comprises the following steps:
step 1, a central processing unit respectively enables two displays to play a section of set audio signals, a microphone connected with the central processing unit is used for measuring the delay difference of the two audio signals, the audio signal playing buffer of the display with smaller delay is adjusted, and the playing time of the two audio signals played by two display interfaces from a loudspeaker of the display is equal;
step 2, the central processing unit is connected with the two displays through the interface of the central processing unit, configuration information of the two displays is obtained, whether the connected displays support audio output or not is judged according to the configuration information, and therefore the number of the connected displays supporting audio output is obtained;
step 3, a user sets the positions of the two displays by himself and inputs the position information of the two displays into a central processing unit, the central processing unit acquires the placing positions of the two displays according to the position information, and the standard placing modes supported by the two displays are horizontally placed side by side and vertically placed side by side;
step 4, the central processing unit obtains the current video output modes of the two displays;
step 5, when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, judging that the audio output modes of the two displays are left and right channel different-screen modes, outputting a left channel by a left display, outputting a right channel by a right display, and having the same playing delay difference of the two displays;
when the number of the displays supporting audio output is 2, the displays are vertically arranged side by side, and the current video output modes of the two displays are different-screen simultaneous display, one display is randomly or appointed by a user to output audio;
when the number of the displays supporting audio output is 2, the displays are horizontally arranged side by side or vertically arranged side by side, and the current video output modes of the two displays are different-screen display, the audio output modes of the two displays are judged to be the left and right channel same-screen mode, and the two displays respectively output audio corresponding to the respective display contents;
when the number of the displays supporting audio output is 2 and the placing modes of the two displays do not belong to the supported standard placing modes, one display is selected randomly or designated by a user to output audio;
when the number of the displays supporting audio output is 1, no matter how the two displays are placed, and no matter whether the current video output modes of the two displays are different-screen simultaneous display or different-screen different display, the audio is output by the display of one side supporting audio output;
when the number of the displays supporting audio output is 0, no audio is output no matter how the two displays are placed or no matter whether the current video output modes of the two displays are different-screen same-display or different-screen different-display;
and 6, after the central processing unit adjusts the content of the audio stream and the buffering of the audio stream according to the audio output mode of each display, outputting the adjusted audio stream from the corresponding display interface.
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| WO2022134169A1 (en) * | 2020-12-21 | 2022-06-30 | 安徽鸿程光电有限公司 | Multi-display-screen system and audio control method thereof |
| CN114501126B (en) * | 2021-12-25 | 2024-03-15 | 深圳市广和通无线股份有限公司 | Video playing method, system and storage medium |
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