CN115529435B - Wireless transmission method, system, equipment and storage medium for high-definition conference picture - Google Patents
Wireless transmission method, system, equipment and storage medium for high-definition conference picture Download PDFInfo
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- CN115529435B CN115529435B CN202211508091.0A CN202211508091A CN115529435B CN 115529435 B CN115529435 B CN 115529435B CN 202211508091 A CN202211508091 A CN 202211508091A CN 115529435 B CN115529435 B CN 115529435B
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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 wireless transmission method, a system, equipment and a storage medium for a high-definition conference picture, 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 switch to an area where the highest resolution shooting sound source is located, transmitting a shot picture through a first channel, and controlling a second camera module to shoot a global area and transmit the shot picture through a second channel; and acquiring shooting pictures transmitted by the first shooting module and the second shooting module, and splicing the shooting pictures by combining the position of the sounding source in the global area to generate conference videos for display. The invention can realize high-definition or ultra-high-definition imaging effect on the local picture of the sounding source in the conference video, and can relatively reduce the data transmission quantity and ensure the smooth playing of the conference video while meeting the aim of communication of the conference video.
Description
Technical Field
The present invention relates to the field of multimedia communications technologies, and in particular, to a method, a system, an apparatus, and a storage medium for wireless transmission of a high-definition conference picture.
Background
With the development of network technology and multimedia technology, high-definition video conference systems such as 4K, 8K and the like are generated; in the high-definition video transmission process, the encoding and decoding of the video and the transmission bandwidth are two key influencing factors. The larger the video size is, the more data volume is needed to be compressed and decompressed in the transmission process, the higher the requirement on the transmission broadband is, so that the conference video which needs to be updated in real time is easy to be blocked or the resolution is needed to be reduced so as to be smoothly played.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a wireless transmission method for high-definition conference pictures.
The second objective of the present invention is to provide a wireless transmission system for high-definition conference pictures.
It is still another 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 wireless transmission method for a high-definition conference picture 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 switch to an area where the highest resolution shooting sound source is located, transmitting a shot picture through a first channel, and controlling a second camera module to shoot a global area and transmit the shot picture through a second channel;
and acquiring shooting pictures transmitted by the first shooting module and the second shooting module, and splicing the shooting pictures by combining the position of the sounding source in the global area to generate conference videos 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 for determining the position of the sound source comprises the following steps:
determining the distance between a sound 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 into a plane model to obtain the coordinates of the sound source in the plane model, and controlling the shooting range of the first shooting module according to the coordinates.
Further, the method for splicing the shot pictures comprises the following steps:
and when the same main body in the second image obtained by shooting by the second image pickup module and the same main body in the first image pickup module are extracted, and the size and the position of the same main body in the first image and the second image are adjusted so that the same main body is overlapped with each other, the first image is integrally covered on the second image to complete the splicing operation.
Further, the joint between the first picture and the second picture is subjected to pixel transition processing.
Further, when the position of the sound source in the plane model is maintained for a preset time, the shooting of the second shooting module is suspended, and a second picture shot by the second shooting module before suspension is reserved to maintain the integrity of the spliced picture until the position of the sound source is changed.
Further, the method further comprises the following steps:
and responding to the adjustment instruction frame to select the region selected by the user in the spliced picture, and issuing a shooting instruction to control the first shooting module to adjust the shooting range of the first shooting module so that the shooting range of the first shooting module covers the sounding source position and the region 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, 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.
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 realizes the high-definition conference picture wireless transmission method when executing the computer program.
The fourth purpose of the invention is realized by adopting the following technical scheme:
a computer readable storage medium having stored thereon a computer program which when executed implements the above-described high definition conference screen wireless transmission method.
Compared with the prior art, the invention has the beneficial effects that:
the invention shoots the local area of the sound source through the first shooting module and transmits the high-definition or ultra-high-definition video; the other areas outside the sound source are shot through the second shooting module, the shooting resolution of the second shooting module can be lower than that of the first shooting module, the image quality of the areas outside the sound source is reduced, the local image of the sound source in the conference video can achieve a high-definition or ultra-high-definition imaging effect, the conference video communication purpose is met, the data transmission quantity can be reduced relatively, and smooth playing of the conference video is ensured.
Drawings
Fig. 1 is a schematic flow chart of a wireless transmission method for a high-definition conference picture according to the present invention;
fig. 2 is a schematic diagram of the operation of the conference device of the present invention;
FIG. 3 is a diagram of a spliced frame according to the present invention;
fig. 4 is a schematic diagram of a spliced picture after a high-definition or ultra-high-definition region is manually selected according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1
The embodiment provides a wireless transmission method for a high-definition conference picture, 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, namely a first camera module and a second camera module, are adopted, and the first camera module and the second camera module are cameras capable of shooting high-definition or ultra-high-definition resolution, wherein 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 that may capture high definition or ultra high definition resolution, and the second camera module may be a camera that captures less resolution than the first camera module.
The sound source positioning module can be microphone equipment which is arranged in an array, and the position of a sound source can be determined while the conference site audio is recorded through the microphone equipment.
The conference device is connected with the central control server, and the central control server is used for receiving and transmitting data and controlling the camera module to shoot the region where the sound source is located and the global region.
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 switch to an area where the highest resolution shooting sound source is located, transmitting a shot picture through a first channel, and controlling a second camera module to shoot a global area and transmit the shot picture through a second channel;
step S2: and acquiring shooting pictures transmitted by the first shooting module and the second shooting module, and splicing the shooting pictures by combining the position of the sounding source in the global area to generate conference videos for display.
As described with reference to fig. 2, after the sound source positioning module of the conference device collects the conference audio, the position of the sound source is determined according to the conference audio, that is, the position of the speaker in the conference room is determined. Specifically: determining the distance between a sound source and a signal receiving point of the conference device according to the sound signal of the conference audio; and mapping the distance between the sound source and the signal receiving point into a plane model according to the plane model corresponding to the internal space of the conference room and the structural member, wherein the position of the conference device in the plane model, which collects conference audio, is marked in the plane model in advance, so that the coordinates of the sound source in the plane model are obtained.
And the central control server sends a control instruction to the conference device in combination with the coordinates of the sounding source in the plane model, controls a first camera module in the conference device to switch to the highest resolution, and shoots the position of the sounding source, so as to obtain a first picture. The first image pickup module is a high-definition or ultra-high-definition camera, so that the first image obtained by shooting is also a high-definition or ultra-high-definition image.
Meanwhile, the central control server also issues a control instruction to the 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 view angle range of the second camera module, so that the second image is shot in the global area to obtain a second image; the second screen may capture a conference room space behind the speaker as a background. The resolution of the second image shot by the second image shooting module can be lower than that of the first image shot by the first image shooting module.
In some embodiments, the current network quality may be tested in real time, and if the current network quality is better, a relatively large amount of data may be processed, and at this time, the second camera module may be controlled to adjust to its highest resolution, or 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 be adjusted 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 sounding source is located are always maintained to be in a state with high-definition or ultra-high-definition resolution.
The first image shot by the first shooting module is a high-definition or ultra-high-definition image, so that the first image is transmitted through a first channel with relatively high data transmission speed; and the resolution of the second picture shot by the second camera module is relatively low, and the second picture is transmitted through a second channel with relatively weak data transmission speed.
The first camera module and the second camera module continuously shoot, so that corresponding video pictures can be obtained, meanwhile, shooting time is marked for each frame of picture in each video picture, after the central control server receives the video pictures shot by the first camera module and the second camera module, a first picture and a second picture with the same shooting time are extracted, and then the two pictures are spliced, and the spliced pictures are presented. Specifically: after the first picture is obtained, any main body of the first picture obtained by shooting by the first shooting module is extracted, and meanwhile, the main body in the second picture obtained by shooting by the second shooting module is also extracted, so that the main body in the extracted first picture is required to be ensured to be identical with the main body extracted by the second picture.
And adjusting the positions and the sizes of the first picture and the second picture at the same shooting time to enable the same main body in the first picture and the second picture to coincide, and at the moment, covering the whole first picture on the second picture to finish the splicing operation. The corresponding position of the first picture in the spliced pictures, namely the region where the sounding source is positioned, presents high-definition or ultra-high-definition resolution image quality, so that other people in the conference can clearly see the speaking process of the speaking person; in the spliced pictures, the area except the first picture is a background picture, and the background picture is an environment picture with relatively low resolution and is provided by the second picture. Since the ambient picture in the conference video is not a high-frequency gaze point of the conference video, the resolution of the ambient picture is relatively low and does not affect the conference quality.
Because the resolution of the first picture is relatively higher and the resolution of the second picture is relatively lower, the joint between the first picture and the second picture in the spliced picture is subjected to pixel transition treatment, namely the resolution of the joint of the first picture is gradually reduced until the resolution is the same as the resolution of the second picture, so that a better image visual effect is obtained, and the treated spliced picture is displayed in a high-definition or ultra-high-definition display screen. As shown in fig. 3, the area B is a first screen, the area a represents a second screen, the characters in the area B are of high-definition or ultra-high-definition resolution, and the characters in the area a are of lower resolution than the first screen.
Because the environment picture in the conference video is not the key point of the conference video, the environment picture is continuously shot and the shot picture is transmitted to occupy a certain broadband, when the position of the sound source in the plane model is kept unchanged for a preset time or the moving position of the speaker is still kept in the shooting range of the first shooting module, the video shooting of the second shooting module is suspended, the second picture shot by the second shooting module before suspension is kept, only the corresponding area of the first picture in the spliced picture is updated in real time, the spliced picture is kept complete until the position of the sound source is changed or until the moving range of the speaker exceeds the shooting range of the first shooting module.
In addition, according to the actual meeting requirement, the speaker or meeting manager can manually adjust the high-definition shooting range, the area needing high-definition display in the spliced pictures which are spliced through the mouse or the touch screen is manually selected, the adjustment instruction is initiated, the central control server responds to the adjustment instruction and then selects the user-selected area from the spliced pictures, and issues the shooting instruction to control the first shooting module to adjust the shooting range, so that the shooting range of the first shooting module covers the sounding source position and the user-selected area, namely the picture size of the first picture shot by the first shooting module is increased, the range of the spliced high-definition or ultra-high-definition picture 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 in the middle of the spliced picture, and the resolution is required to be adjusted by manually selecting the left area of the speaker, and then the first camera module is controlled to adjust the focal length and the shooting angle of the first camera module, so that the shooting range of the first camera module can cover the speaker and the left area of the speaker; in the spliced picture formed by the final splicing, as shown in fig. 4, the pictures in the middle and left areas of the spliced picture are high definition or ultra-high definition, and the pictures in the rest areas are relatively low resolution areas. After the adjustment instruction is canceled, the first camera module can be controlled to recover to the angle and the focal length for shooting only the position of the sounding source, and high-definition or ultra-high-definition shooting is only performed on the position of the speaker.
Example two
The embodiment provides a wireless transmission system of a high-definition conference picture, 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, there is also provided an electronic device including a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing the high-definition conference screen wireless transmission method of embodiment one when executing the computer program; in addition, a computer readable storage medium is provided, on which a computer program is stored, the computer program being executed to implement the above-mentioned high-definition conference picture wireless transmission method.
The system, the device, and the storage medium in the present embodiment and the method in the foregoing embodiments are based on various aspects of the same inventive concept, and the detailed description of the method implementation has been given above, so those skilled in the art can clearly understand the structure and implementation of the system, the device, and the storage medium in the present embodiment according to the foregoing description, and the details are not repeated herein for brevity.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (9)
1. The wireless transmission method of the high-definition conference picture is characterized in that the 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 cameras with high definition or ultra-high 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, if the current network speed is lower than a preset value, acquiring conference audio to determine the position of a sound source, issuing a shooting instruction to control a first shooting module to switch to the area where the highest resolution shooting sound source is located, 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, the global area is shot to obtain a second picture, and the second picture is transmitted through a second channel, wherein the data transmission speed of the first channel is faster than that of the second channel; the data processing capacity is scheduled to intensively transmit the high-definition or ultra-high-definition pictures shot by the first shooting module, and the video pictures of the area where the sounding source is positioned are always maintained in a high-definition or ultra-high-definition resolution state;
and extracting a first picture and a second picture with the same shooting time, and adjusting the positions and the sizes of the first picture and the second picture with the same shooting time to ensure that identical main bodies in the first picture and the second picture are overlapped, and at the moment, the first picture is entirely covered on the second picture to finish splicing operation for display.
2. The wireless transmission method of high-definition conference pictures according to claim 1, wherein the method for determining the position of the sound source is as follows:
determining the distance between a sound 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 into a plane model, obtaining the coordinates of the sound source in the plane model, and controlling the shooting range of the first shooting module according to the coordinates.
3. The wireless transmission method of high-definition conference pictures according to claim 1, wherein the method for stitching the photographed pictures is as follows:
and when the same main body in the second image obtained by shooting by the second image pickup module and the same main body in the first image pickup module are extracted, and the size and the position of the same main body in the first image and the second image are adjusted so that the same main body is overlapped with each other, the first image is integrally covered on the second image to complete the splicing operation.
4. The wireless transmission method of high-definition conference pictures according to claim 3, wherein the joint between the first picture and the second picture is subjected to pixel transition processing.
5. The wireless transmission method of high-definition conference pictures according to claim 2, wherein when the position of the sounding source in the plane model is maintained for a preset time, the shooting of the second camera module is paused, and a second picture shot by the second camera module before the pause is reserved to maintain the integrity of the spliced picture until the position of the sounding source is changed.
6. The high-definition conference picture wireless transmission method according to claim 1, further comprising:
and responding to the adjustment instruction frame to select the region selected by the user in the spliced picture, and issuing a shooting instruction to control the first shooting module to adjust the shooting range of the first shooting module so that the shooting range of the first shooting module covers the position of the sounding source and the region selected by the user.
7. A high definition conference screen wireless transmission system, comprising:
the conference device comprises at least two camera modules and at least one sound source positioning module;
the central control server is connected with the conference device and executes the wireless transmission method of the high-definition conference picture according to any one of claims 1-6.
8. An electronic device, characterized in that it comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the wireless transmission method of the high-definition conference picture according to any one of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, wherein a computer program is stored thereon, the computer program when executed implementing the wireless transmission method for high-definition conference pictures according to any one of claims 1 to 6.
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