CN115529435A - High-definition conference picture wireless transmission method, system, equipment and storage medium - Google Patents
High-definition conference picture wireless transmission method, system, equipment and storage medium Download PDFInfo
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- CN115529435A CN115529435A CN202211508091.0A CN202211508091A CN115529435A CN 115529435 A CN115529435 A CN 115529435A CN 202211508091 A CN202211508091 A CN 202211508091A CN 115529435 A CN115529435 A CN 115529435A
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses a high-definition conference picture wireless transmission method, a system, equipment and a storage medium, wherein the method comprises the following steps: acquiring conference audio to determine the position of a sound source, issuing a shooting instruction to control a first camera module to be switched to an area where the sound source is shot at the highest resolution, transmitting a picture obtained by shooting through a first channel, and controlling a second camera module to shoot a global area and transmit the picture through a second channel; and acquiring the shooting pictures transmitted by the first camera module and the second camera module, and splicing the shooting pictures by combining the positions of the sound sources in the global area to generate a conference video for display. The invention realizes high-definition or ultra-high-definition imaging effect on the local image where the sound source is positioned in the conference video, meets the purpose of conference video communication, and can relatively reduce data transmission quantity and ensure that the conference video is smoothly played.
Description
Technical Field
The invention relates to the technical field of multimedia communication, in particular to a high-definition conference picture wireless transmission method, a system, equipment and a storage medium.
Background
With the development of network technology and multimedia technology, high-definition video conference systems such as 4K, 8K and the like have come into force; in the transmission process of high-definition videos, the encoding and decoding of the videos and the transmission bandwidth are two key influence factors. The video pictures are used as a whole for data transmission, the larger the video size is, the more the data volume needing compression and decompression in the transmission process is, the higher the requirement on transmission bandwidth is, and the conference video needing to be updated in real time is easy to be blocked or the conference video can be smoothly played only by reducing the resolution.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the present invention is to provide a high definition conference picture wireless transmission method.
The invention also aims to provide a high-definition conference picture wireless transmission system.
It is a further object of the present invention to provide an electronic device.
It is a fourth object of the present invention to provide a computer readable storage medium.
One of the purposes of the invention is realized by adopting the following technical scheme:
a high-definition conference picture wireless transmission method comprises the following steps:
acquiring conference audio to determine the position of a sound source, issuing a shooting instruction to control a first camera module to be switched to an area where the sound source is shot at the highest resolution, transmitting a picture obtained by shooting through a first channel, and controlling a second camera module to shoot a global area and transmit the picture through a second channel;
and acquiring the shooting pictures transmitted by the first camera module and the second camera module, and splicing the shooting pictures by combining the positions of the sound sources in the global area to generate a conference video for display.
Further, the data transmission speed of the first channel is faster than the data transmission speed of the second channel.
Further, the method of determining the position of the sound source is:
determining the distance between a sound emitting source and a signal receiving point according to the sound signal of the conference audio;
and mapping the distance between the sound emitting source and the signal receiving point to a plane model to obtain the coordinate of the sound emitting source in the plane model, and controlling the shooting range of the first camera module according to the coordinate.
Further, the method for splicing the shot pictures comprises the following steps:
and when the size and the position of the same main body in the first picture and the second picture are adjusted to ensure that the same main body is overlapped, the first picture is entirely covered on the second picture to finish the splicing operation.
Further, pixel transition processing is carried out at the joint between the first picture and the second picture.
Further, when the position of the sound source in the plane model is kept unchanged for a preset time, the shooting of the second camera module is paused, and a second picture shot by the second camera module before pausing is reserved to keep the integrity of the spliced picture until the position of the sound source is changed.
Further, still include:
responding to the adjusting instruction frame to select the area selected by the user in the spliced picture, issuing a shooting instruction to control the first camera module to adjust the shooting range of the first camera module, and enabling the shooting range of the first camera module to cover the sound production source position and the area selected by the user.
The second purpose of the invention is realized by adopting the following technical scheme:
a high definition conference picture wireless transmission system comprises:
the conference device comprises at least two camera modules and at least one sound source positioning module;
and the central control server is connected with the conference device and executes the high-definition conference picture wireless transmission method.
The third purpose of the invention is realized by adopting the following technical scheme:
an electronic device comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the wireless transmission method for high-definition conference pictures.
The fourth purpose of the invention is realized by adopting the following technical scheme:
a computer-readable storage medium on which a computer program is stored, which when executed, implements the above-described high-definition conference picture wireless transmission method.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps that a local area where a sound source is located is shot through a first camera module and transmitted through high-definition or ultra-high-definition video; the rest areas outside the sound source are shot through the second camera module, the shooting resolution of the second camera module is lower than that of the first camera module, which is equivalent to reducing the picture quality of the areas outside the sound source, so that the local picture where the sound source is located in the conference video realizes high-definition or ultra-high-definition imaging effect, the conference video communication purpose is met, the data transmission quantity can be relatively reduced, and the conference video is ensured to be played smoothly.
Drawings
Fig. 1 is a schematic flow chart of a high-definition conference picture wireless transmission method according to the present invention;
FIG. 2 is a schematic diagram of the operation of the conferencing device of the present invention;
FIG. 3 is a schematic diagram of a tiled display according to the present invention;
fig. 4 is a schematic diagram of a spliced picture after a high-definition or ultra-high-definition area is manually selected.
Detailed Description
The present invention is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the case of no conflict, any combination between the embodiments or technical features described below may form a new embodiment.
Example one
The embodiment provides a high-definition conference picture wireless transmission method which can be matched with a conference device for common use; the conference device comprises at least two camera modules and at least one sound source positioning module; in this embodiment, two camera modules are adopted, namely a first camera module and a second camera module, which are both cameras capable of shooting high definition or ultra-high definition resolution, where the high definition resolution refers to 720P or 1080P; the ultra high definition may be 4K, 8K resolution.
In some embodiments, the first camera module may be a camera capable of shooting high definition or ultra high definition resolution, and the second camera module may be a camera with shooting resolution lower than that of the first camera module.
The sound source positioning module can be microphone equipment arranged in an array, and can determine the position of a sound source while recording conference site audio through the microphone equipment.
The conference device is connected with a central control server, and the central control server is used for receiving and sending data and controlling the camera module to shoot the area where the sound source is located and the global area.
As shown in fig. 1, the method executed by the central control server specifically includes the following steps:
step S1: acquiring conference audio to determine the position of a sound source, issuing a shooting instruction to control a first camera module to be switched to an area where the sound source is shot at the highest resolution, transmitting a shot picture through a first channel, and controlling a second camera module to shoot a global area and transmit the picture through a second channel;
step S2: and acquiring the shooting pictures transmitted by the first camera module and the second camera module, and splicing the shooting pictures by combining the positions of the sound sources in the global area to generate a conference video for display.
As described with reference to fig. 2, after the sound source positioning module of the conference device collects the conference audio, the sound source positioning module determines the position of the sound source according to the conference audio, that is, determines the position of the speaker in the conference room. Specifically, the method comprises the following steps: determining the distance between a sound generating source and a signal receiving point of the conference device according to a sound signal of conference audio; and according to the internal space of the conference room and a plane model corresponding to the structural member, the position of the conference device for acquiring conference audio in the plane model is marked in advance in the plane model, and the distance between the sound emitting source and the signal receiving point is mapped to the plane model, so that the coordinate of the sound emitting source in the plane model is obtained.
And the central control server combines the coordinates of the sound source in the plane model to issue a control instruction to the conference device, controls a first camera module in the conference device to be switched to the highest resolution, and shoots the position of the sound source to obtain a first picture. The first camera module is a camera with high definition or ultrahigh definition, so that the first shot picture is also a high definition or ultrahigh definition picture.
Meanwhile, the central control server also issues a control instruction to a second camera module, controls the second camera module to face the direction of the speaker, adjusts the focal length of the second camera module, and enlarges the visual angle range of the second camera module, so that a second picture is shot against the global area; the second screen can capture the speaker and the conference room space behind the speaker as a background. The resolution of the second picture shot by the second camera module can be lower than the resolution of the first picture shot by the first camera module.
In some embodiments, the current network quality may also be tested in real time, and if the current network quality is better and a relatively large amount of data can be processed, the second camera module may also be controlled to adjust to its highest resolution, even 4K or 8K resolution, to capture things in an area other than the sound source. If the current network quality is general, the second camera module can be controlled to adjust to a state with relatively low resolution to shoot the global area, the data processing capacity is mainly used for transmitting high-definition or ultra-high-definition pictures shot by the first camera module, and the video pictures of the area where the sound source is located are always maintained in a state with high-definition or ultra-high-definition resolution.
A first picture obtained by shooting through the first camera module is a picture with high definition or ultrahigh definition, so that the first picture is transmitted through a first channel with relatively high data transmission speed; and if the resolution of the second picture shot by the second camera module is relatively low, the second picture is transmitted through a second channel with relatively low data transmission speed.
The central control server receives the video pictures shot by the first camera module and the second camera module, extracts a first picture and a second picture with the same shooting time, splices the two pictures and displays the spliced pictures. Specifically, the method comprises the following steps: after the first picture is obtained, any main body of the first picture obtained by shooting by the first camera module is extracted, and simultaneously, a main body of the second picture obtained by shooting by the second camera module is also extracted, wherein the extracted main body of the first picture is required to be the same as the extracted main body of the second picture.
And adjusting the positions and the sizes of the first picture and the second picture at the same shooting time to ensure that the same main body in the first picture and the second picture is overlapped, and at the moment, covering the first picture on the second picture integrally to finish the splicing operation. The position corresponding to the first picture in the spliced pictures, namely the area where the sound source is located presents the image quality with high definition or ultrahigh definition, so that other people in the conference can clearly see the speech process of the speaker; in the spliced pictures, the area outside the first picture is a background picture, and the background picture is an environmental picture with relatively low resolution and is provided by a second picture. Because the environmental picture in the conference video is not the high-frequency fixation point of the conference video, the resolution of the environmental picture is relatively low, and the conference quality is not influenced.
Because the resolution ratio of the first picture is relatively high and the resolution ratio of the second picture is relatively low, pixel transition processing is carried out on a spliced part between the first picture and the second picture in the spliced pictures, namely the resolution ratio of the spliced part of the first picture is gradually reduced until the resolution ratio of the spliced part of the first picture is the same as that of the second picture, so that a better image visual effect is obtained, and the processed spliced pictures are displayed on a high-definition or ultra-high-definition display screen. As shown in fig. 3, the area B in fig. 3 is a first image, the area a represents a second image, the person in the area B has high definition or ultra high definition resolution, and the person in the area a has lower resolution than the first image.
Because the environmental picture in the conference video is not the focus of the conference video, the environmental picture is continuously shot and the shot picture transmission can occupy a certain broadband, when the position of a sound source in a plane model is kept unchanged for a preset time or the position of a speaker moving is still kept in the shooting range of the first camera module, the video shooting of the second camera module is paused, the second picture shot by the second camera module before pausing is kept, the area corresponding to the first picture in the spliced picture is updated only in real time, the spliced picture is kept complete until the position of the sound source is changed or the moving range of the speaker exceeds the shooting range of the first camera module.
In addition, according to the actual meeting requirements, a speaker or meeting management personnel can manually adjust a high-definition shooting range, manually select an area needing high-definition display in the spliced pictures completed through a mouse or a touch screen, at this moment, the adjustment instruction is initiated, the central control server selects an area selected by a user from the spliced pictures after responding to the adjustment instruction, sends a shooting instruction to control the first camera module to adjust the shooting range of the first camera module, so that the shooting range of the first camera module covers the sound production source position and the area selected by the user, namely, the size of the first picture shot by the first camera module is increased, the range of the spliced high-definition or ultra-high-definition pictures is also increased, and the manually selected area also presents the picture quality of high-definition or ultra-high-definition resolution.
As shown in fig. 3, the position of the speaker is located in the middle of the spliced frame, the resolution needs to be adjusted when the left area of the speaker is manually selected, and at this time, the first camera module is controlled to adjust the focal length and the shooting angle thereof, so that the shooting range of the first camera module can cover the speaker and the left area of the speaker; in the final spliced picture, as shown in fig. 4, the pictures in the middle and left regions of the spliced picture have high definition or ultra-high definition resolution, and the pictures in the remaining regions have relatively low resolution. After the adjustment instruction is cancelled, the first camera module can be controlled to recover to the angle and the focal length for only shooting the position of the sound source, and only high-definition or ultrahigh-definition shooting is carried out on the position of the speaker.
Example two
The embodiment provides a high-definition conference picture wireless transmission system, which comprises a conference device and a central control server; the conference device comprises at least two camera modules and at least one sound source positioning module; and the central control server is connected with the conference device and executes the high-definition conference picture wireless transmission method.
In some embodiments, an electronic device is also provided, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the processor implements the high definition conference screen wireless transmission method in the first embodiment; in addition, a computer-readable storage medium is also provided, on which a computer program is stored, which when executed, implements the above-described high-definition conference picture wireless transmission method.
The system, the device, and the storage medium in this embodiment are based on multiple aspects of the same inventive concept, and the method implementation process has been described in detail in the foregoing, so that those skilled in the art can clearly understand the structure and implementation process of the system, the device, and the storage medium in this embodiment according to the foregoing description, and for the sake of brevity of the description, no further description is given here.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A high-definition conference picture wireless transmission method is characterized in that a conference device comprises two camera modules and at least one sound source positioning module, wherein the first camera module and the second camera module are both cameras with high definition or ultrahigh definition resolution; wherein high definition resolution refers to 720P or 1080P; ultra high definition refers to 4K, 8K resolution; the method comprises the following steps:
detecting the current network quality, acquiring conference audio to determine the position of a sound source if the current network speed is lower than a preset value, issuing a shooting instruction to control a first camera module to be switched to the area where the sound source is shot at the highest resolution, and transmitting a first picture obtained by shooting through a first channel; the second camera module is controlled to be adjusted to a state that the resolution ratio is lower than that of the first camera module to shoot the global area to obtain a second picture and transmit the second picture through a second channel, the data processing capacity is dispatched to the high-definition or ultra-high-definition picture shot by the first camera module in a centralized manner, and the video picture of the area where the sound source is located is always maintained in a state of high-definition or ultra-high-definition resolution ratio;
extracting a first picture and a second picture at the same shooting time, adjusting the position and the size of the first picture and the second picture at the same shooting time to enable the first picture and the second picture to be coincident with each other, and at the moment, covering the first picture on the second picture integrally to finish splicing operation for display.
2. The wireless transmission method for high-definition conference pictures according to claim 1, wherein the data transmission speed of the first channel is faster than the data transmission speed of the second channel.
3. The wireless transmission method for high-definition conference pictures according to claim 1, wherein the method for determining the position of the sound source comprises the following steps:
determining the distance between a sound emitting source and a signal receiving point according to the sound signal of the conference audio;
and mapping the distance between the sound source and the signal receiving point to a plane model to obtain the coordinate of the sound source in the plane model, and controlling the shooting range of the first camera module according to the coordinate.
4. The high-definition conference picture wireless transmission method according to claim 1, wherein the method for splicing the shot pictures comprises the following steps:
and when the size and the position of the same main body in the first picture and the second picture are adjusted to ensure that the same main body is overlapped, the first picture is entirely covered on the second picture to finish the splicing operation.
5. The wireless transmission method for high-definition conference pictures according to claim 4, wherein a pixel transition process is performed at a joint between the first picture and the second picture.
6. The wireless transmission method for high-definition conference pictures according to claim 3, wherein when the position of the sound source in the planar model is maintained for a preset time, the shooting of the second camera module is paused, and the second picture shot by the second camera module before pausing is retained to maintain the integrity of the spliced picture until the position of the sound source is changed.
7. The wireless transmission method for high-definition conference pictures according to claim 1, further comprising:
responding to the adjusting instruction frame to select the area selected by the user in the spliced picture, issuing a shooting instruction to control the first camera module to adjust the shooting range of the first camera module, and enabling the shooting range of the first camera module to cover the position of the sound source and the area selected by the user.
8. A high definition conference picture wireless transmission system is characterized by comprising:
the conference device comprises at least two camera modules and at least one sound source positioning module;
and the central control server is connected with the conference device and executes the high-definition conference picture wireless transmission method according to any one of claims 1 to 7.
9. An electronic device, comprising a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the processor implements the wireless transmission method for high definition conference pictures according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed, implements the high definition conference picture wireless transmission method according to any one of claims 1 to 7.
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