CN115209156A - Video signal transmission method and system with adjustable channel frequency points - Google Patents

Abstract

The invention relates to the technical field of video transmission, and discloses a method and a system for transmitting video signals with adjustable channel frequency points.

Description

A video signal transmission method and system with adjustable channel frequency

technical field

The invention relates to the technical field of video transmission, in particular to a video signal transmission method and system with adjustable channel frequency.

Background technique

At present, the conference venues generally install wired VGA/DVI/HDMI and other video signal access points at fixed positions of the venue, and transmit the video signals of the portable terminal to the venue display system (such as RGB matrix or projector, etc.) through the cable. However, in the existing access mode, different video signals in the same scene of the video signal of the conference site interfere with each other during transmission, resulting in the degradation of the quality of the video signal.

SUMMARY OF THE INVENTION

The present invention provides a video signal transmission method and system with adjustable channel frequency, which solves the technical problem that different video signals in the same scene interfere with each other during transmission, resulting in the reduction of video signal quality.

In view of this, a first aspect of the present invention provides a video signal transmission method with adjustable channel frequency, including the following steps:

Encoding and compressing the multiple video signals sent by the sending end respectively to obtain multiple video compressed signals;

dividing a plurality of the video compression signals into a plurality of data item sets according to the data stream size;

Allocating all video compressed signals in the data item set to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is adapted to the transmission bearing capacity of the corresponding sub-channel;

Corresponding scheduling time slots are allocated to all transmission links according to the link time slot allocation method, and multiple sub-channels are allocated to the transmission links of the same scheduling time slot, and video compressed signals are sent to the video terminal.

Preferably, the step of dividing a plurality of the video compression signals into a plurality of data item sets according to the data stream size specifically includes:

Get the data stream size of each video compressed signal;

The data stream size of each video compressed signal is compared with the preset capacity ranges of multiple data streams, and the video compressed signals within the capacity range of each data stream are divided into a data item set to obtain multiple data item sets.

Preferably, according to the link time slot allocation method, corresponding scheduling time slots are allocated to all transmission links, and the steps of allocating multiple sub-channels to the transmission links of the same scheduling time slot and concurrently sending video compressed signals to the video terminal specifically include:

Traverse all transmission links to determine whether the two transmission links generate conflicting interference when they transmit in parallel at the same time. are conflicting links;

Allocate different scheduling time slots to transmission links that are conflicting links;

Allocate the same scheduling time slot to the transmission links that are not conflicting links with each other, and the number of transmission links in the same scheduling time slot is between the preset maximum limit and minimum limit of the number of links;

When all scheduled time slots are allocated, new time slots are allocated in sequence for the remaining transmission links in sequence;

According to the preset priority order, each video compressed signal is queued for transmission in the corresponding sub-channel, and multiple sub-channels are allocated to the transmission link of the same scheduled time slot, and the video compressed signal is sent to the video terminal.

Preferably, the method also includes:

Based on Zig-Bee wireless communication technology, the video compressed signal is transmitted to the video terminal.

Preferably, the method also includes:

A data sharing channel is constructed between all video terminals using a key sharing transmission algorithm;

Intercept and copy data to send the shared data of the video terminal, determine whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, transmit the shared data to the required video terminal.

In a second aspect, the present invention also provides a video signal transmission system with adjustable channel frequency, including:

The compression module is used for encoding and compressing the multiple video signals sent by the sending end respectively, so as to obtain multiple video compressed signals;

a data division module, configured to divide a plurality of the video compression signals into a plurality of data item sets according to the data stream size;

The channel allocation module is used to allocate all video compressed signals in the data item set to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is equal to the transmission bearing capacity of the corresponding sub-channel. adapt;

The transmission module is used for allocating corresponding scheduling time slots for all transmission links according to the link time slot allocation method, allocating multiple sub-channels to the transmission links of the same scheduling time slot and sending video compression signals to the video terminal.

Preferably, the data division module specifically includes:

The data stream acquisition module is used to acquire the data stream size of each video compression signal;

The division module is used to compare the data stream size of each video compressed signal with the preset capacity ranges of multiple data streams, and divide the video compressed signals within the capacity range of each data stream into a data item set to obtain multiple data streams. A collection of data items.

Preferably, the transmission module specifically includes:

The conflict judgment module is used to traverse all the transmission links, and judge whether the two transmission links generate conflict interference when they transmit in parallel at the same time. The two transmission links are judged to be conflicting links with each other;

a first time slot allocation module, configured to allocate different scheduling time slots to transmission links that are conflicting links;

The second time slot allocation module is configured to allocate the same scheduling time slot to the transmission links that are not conflicting links, and the number of transmission links in the same scheduling time slot is within the preset maximum limit of the number of links and the minimum limit;

The third time slot allocation module is used for allocating new time slots to the remaining transmission links in sequence according to the time sequence when all the scheduling time slot allocations are completed;

The channel transmission module is used for queuing transmission of each video compressed signal in the corresponding sub-channel according to the preset priority order, and assigning multiple sub-channels to the transmission link of the same scheduling time slot and concurrently sending the video compression signal to the transmission link. video terminal.

Preferably, the system further includes:

The wireless transmission module is used to transmit the compressed video signal to the video terminal based on the Zig-Bee wireless communication technology.

Preferably, the system further includes:

A channel building module for building a data sharing channel among all video terminals using a key sharing transmission algorithm;

The shared data transmission module is used for intercepting and copying the shared data of the video terminal for data transmission, and judging whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, the shared data is transmitted to the Video terminal is required.

As can be seen from the above technical solutions, the present invention has the following advantages:

The invention improves the transmission rate by separately encoding and compressing multiple video signals sent by the sending end, divides the video compressed signals into multiple data item sets according to the size of the data stream, and divides all the video compressed signals according to the size of the data stream. It is allocated to the corresponding sub-channel, so that the data stream size of the data item set is adapted to the transmission carrying capacity of the corresponding sub-channel, and the transmission efficiency is improved. The channel is allocated to the transmission link of the same scheduling time slot and the video compressed signal is sent to the video terminal, so as to avoid the large number of links in the network, which limits the number of links that transmit data concurrently at the same time Different video signals interfere with each other during transmission, which improves the video signal quality.

Description of drawings

1 is a flowchart of a method for transmitting a video signal with adjustable channel frequency according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a video signal transmission system with adjustable channel frequency points according to an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

For ease of understanding, please refer to FIG. 1 , a video signal transmission method with adjustable channel frequency provided by the present invention includes the following steps:

S1. Encoding and compressing the multiple video signals sent by the sending end respectively, to obtain multiple video compressed signals.

It can be understood that encoding and compressing the video signal separately can improve the transmission rate; among them, the lossless encoding and compression algorithm is used, and the statistical redundancy of the data is used for compression, which can completely restore the original data without causing any distortion. .

S2. Divide the multiple video compression signals into multiple data item sets according to the size of the data stream.

S3. Allocate all the video compressed signals in the data item set to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is adapted to the transmission bearing capacity of the corresponding sub-channel.

Among them, the video compressed signal is allocated to the corresponding sub-channel according to the data stream size, so that the data stream size of the data item set is adapted to the transmission bearing capacity of the corresponding sub-channel, and the transmission channel bandwidth is determined by the characteristics of the data items to be transmitted. The transmission channel is adapted to the transmission data item, which can further improve the transmission efficiency.

S4. Allocate corresponding scheduling time slots to all transmission links according to the link time slot allocation method, and allocate multiple sub-channels to the transmission links of the same scheduling time slot and transmit video compression signals to the video terminal.

It can be understood that different links work in different time slots through the link time slot allocation method, so as to avoid a large number of links in the network, which will limit the number of links that transmit data concurrently at the same time, resulting in link The cumulative interference of the files is too high to allow normal communication.

This embodiment provides a video signal transmission method with adjustable channel frequency. The transmission rate is increased by encoding and compressing multiple video signals sent by the sending end respectively, and the video compressed signals are divided according to the size of the data stream. For multiple data item sets, all video compressed signals are allocated to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set can be adapted to the transmission carrying capacity of the corresponding sub-channel, and the transmission efficiency is improved. It also allocates corresponding scheduling time slots to all transmission links, and allocates multiple sub-channels to the transmission links of the same scheduling time slot and transmits video compression signals to video terminals, so as to avoid a large number of links in the network, resulting in the same The number of links that transmit data concurrently at any time is limited, which avoids mutual interference between different video signals in the same scene during transmission, and improves the quality of video signals.

In a specific embodiment, step S2 specifically includes:

S201, obtaining the data stream size of each video compression signal;

S202: Compare the data stream size of each video compressed signal with the preset capacity ranges of multiple data streams, and divide the video compressed signals within the capacity range of each data stream into a data item set to obtain multiple data items gather.

It can be understood that the size of the data stream of each video compressed signal, that is, the capacity of the transmission channel occupied, and by dividing the data stream size of the video compressed signal in different ranges, multiple sets of data items are obtained, which is convenient for subsequent allocation. channel.

In a specific embodiment, step S4 specifically includes:

S401 , traverse all the transmission links, and determine whether the two transmission links generate conflicting interference when they transmit in parallel at the same time. The paths are determined to be conflicting links.

In a general example, distortion detection can be performed on the data streams concurrently sent by the two transmission links to the receiving end. If distortion is found in the data streams concurrently sent to the receiving end by the two transmission links, it is determined that the two transmission links are parallel at the same time. Collision interference occurs during transmission.

S402. Allocate different scheduling time slots to transmission links that are conflicting links.

It can be understood that different scheduling time slots are allocated to the transmission links that are conflicting links, so as to avoid finding conflicting interference after concurrently transmitting signals at the same time.

S403. Allocate the same scheduling time slot to the transmission links that are not conflicting links with each other, and the number of transmission links in the same scheduling time slot is between the preset maximum limit and minimum limit of the number of links.

For transmission links that are not conflicting links, the same scheduling time slot can be allocated, but the number of transmission links in the same scheduling time slot is between the preset maximum limit and minimum limit of the number of links, so as to Guarantee the quality of the signal carried by the link and avoid interference.

S404 , when all the scheduling time slots are allocated, allocate new time slots in sequence for the remaining transmission links in sequence.

Among them, different time slots can be allocated to work for each of the remaining transmission links.

S405. Queue each video compressed signal in the corresponding sub-channel according to the preset priority order, and allocate multiple sub-channels to the transmission link of the same scheduling time slot and transmit the video compressed signal to the video terminal.

Among them, the priority order can be preset, which can be set according to manual experience, or set according to the size of the data stream, so that the video signals are transmitted in sequence, so as to avoid the normal use of the venue display system due to the large transmission load.

In a specific embodiment, the method further includes:

Based on Zig-Bee wireless communication technology, the video compressed signal is transmitted to the video terminal.

Among them, Zig-Bee wireless communication technology is adopted, which is derived from the communication method of bee colony, which is characterized by a short distance, and its usual transmission distance is 10-100m; usually, Zig-Bee wireless communication often works at 20 -250kbps lower rate; short delay, fast response speed of Zig-Bee wireless communication, etc., can be embedded in various devices.

In a specific embodiment, the method further includes:

S5, using a key sharing transmission algorithm to construct a data sharing channel among all video terminals.

Among them, the key sharing transmission algorithm is adopted so that a shared channel can be established between multiple video terminals through key authentication, so as to realize the mutual transmission of data and facilitate the sharing of data; wherein, the key sharing transmission algorithm includes:

The requester sends a request to the sender, and the requested sender immediately generates an authentication address and sends it to the requester;

The demander searches the password space after obtaining the authentication address, and feeds back the corresponding password to the sender for authentication;

If the password authentication matches, a link will be established, otherwise, the authentication will be re-authenticated, which ensures the security of data transmission and avoids the loss of resources caused by being received by outsiders.

S6. Intercept and copy the data to send the shared data of the video terminal, determine whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, transmit the shared data to the required video terminal.

Among them, according to whether the transmission channel of the required video terminal has been occupied, it is judged whether the transmission state of the required video terminal is idle. If the transmission channel of the required video terminal has been occupied, it is busy, and it is necessary to wait for the transmission channel of the required video terminal to be unoccupied. (idle), resend shared data.

The above is a detailed description of an embodiment of a video signal transmission method with adjustable channel frequency provided by the present invention, and the following is a detailed description of an embodiment of a video signal transmission system with adjustable channel frequency provided by the present invention.

For easy understanding, please refer to FIG. 2 , a video signal transmission system with adjustable channel frequency provided by the present invention includes:

The compression module 100 is used for encoding and compressing the multiple video signals sent by the sending end respectively, so as to obtain multiple video compressed signals;

The data division module 200 is used for dividing a plurality of video compression signals into a plurality of data item sets according to the data stream size;

The channel allocation module 300 is used for allocating all video compressed signals in the data item set into corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is adapted to the transmission bearing capacity of the corresponding sub-channel;

The transmission module 400 is used for allocating corresponding scheduling time slots for all transmission links according to the link time slot allocation method, and allocating multiple subchannels to the transmission links of the same scheduling time slot and concurrently sending video compression signals to video terminals.

In a specific embodiment, the data division module specifically includes:

The data stream acquisition module is used to acquire the data stream size of each video compression signal;

The division module is used to compare the data stream size of each video compressed signal with the preset capacity ranges of multiple data streams, and divide the video compressed signals within the capacity range of each data stream into a data item set to obtain multiple data streams. A collection of data items.

In a specific embodiment, the transmission module specifically includes:

The conflict judgment module is used to traverse all the transmission links, and judge whether the two transmission links generate conflict interference when they transmit in parallel at the same time. The two transmission links are judged to be conflicting links with each other;

a first time slot allocation module, configured to allocate different scheduling time slots to transmission links that are conflicting links;

The second time slot allocation module is configured to allocate the same scheduling time slot to the transmission links that are not conflicting links, and the number of transmission links in the same scheduling time slot is within the preset maximum limit of the number of links and the minimum limit;

The third time slot allocation module is used for allocating new time slots to the remaining transmission links in sequence according to the time sequence when all the scheduling time slot allocations are completed;

The channel transmission module is used for queuing transmission of each video compressed signal in the corresponding sub-channel according to the preset priority order, and assigning multiple sub-channels to the transmission link of the same scheduling time slot and concurrently sending the video compression signal to the transmission link. video terminal.

In a specific embodiment, the system further includes:

The wireless transmission module is used to transmit the compressed video signal to the video terminal based on the Zig-Bee wireless communication technology.

In a specific embodiment, the system further includes:

A channel building module for building a data sharing channel among all video terminals using a key sharing transmission algorithm;

The shared data transmission module is used for intercepting and copying the shared data of the video terminal for data transmission, judging whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, the shared data is transmitted to the required video terminal.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, system and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided by the present invention, it should be understood that the disclosed system and method may be implemented in other manners. For example, the system embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection between systems or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. a video signal transmission method with adjustable channel frequency, is characterized in that, comprises the following steps: Encoding and compressing the multiple video signals sent by the sending end respectively to obtain multiple video compressed signals; dividing a plurality of the video compression signals into a plurality of data item sets according to the data stream size; Allocating all video compressed signals in the data item set to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is adapted to the transmission bearing capacity of the corresponding sub-channel; Corresponding scheduling time slots are allocated to all transmission links according to the link time slot allocation method, and multiple sub-channels are allocated to the transmission links of the same scheduling time slot, and video compressed signals are sent to the video terminal. 2. The video signal transmission method with adjustable channel frequency according to claim 1, wherein the step of dividing a plurality of the video compressed signals into a plurality of data item sets according to the data stream size specifically comprises: Get the data stream size of each video compressed signal; The data stream size of each video compressed signal is compared with the preset capacity ranges of multiple data streams, and the video compressed signals within the capacity range of each data stream are divided into a data item set to obtain multiple data item sets. 3. The video signal transmission method with adjustable channel frequency according to claim 1, characterized in that, according to the link time slot allocation method, corresponding scheduling time slots are allocated to all transmission links, and a plurality of sub-channels are allocated to the same The step of concurrently sending video compression signals to the video terminal in the transmission link of the scheduled time slot specifically includes: Traverse all transmission links to determine whether the two transmission links generate conflicting interference when they transmit in parallel at the same time. are conflicting links; Allocate different scheduling time slots to transmission links that are conflicting links; Allocate the same scheduling time slot to the transmission links that are not conflicting links with each other, and the number of transmission links in the same scheduling time slot is between the preset maximum limit and minimum limit of the number of links; When all scheduled time slots are allocated, new time slots are allocated in sequence for the remaining transmission links in sequence; According to the preset priority order, each video compressed signal is queued for transmission in the corresponding sub-channel, and multiple sub-channels are allocated to the transmission link of the same scheduled time slot, and the video compressed signal is sent to the video terminal. 4. The video signal transmission method with adjustable channel frequency according to claim 1, characterized in that, further comprising: Based on Zig-Bee wireless communication technology, the video compressed signal is transmitted to the video terminal. 5. The video signal transmission method with adjustable channel frequency according to claim 1, characterized in that, further comprising: A data sharing channel is constructed between all video terminals using a key sharing transmission algorithm; Intercept and copy data to send the shared data of the video terminal, determine whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, transmit the shared data to the required video terminal. 6. A video signal transmission system with adjustable channel frequency, characterized in that, comprising: The compression module is used for encoding and compressing the multiple video signals sent by the sending end respectively, so as to obtain multiple video compressed signals; a data division module, configured to divide a plurality of the video compression signals into a plurality of data item sets according to the data stream size; The channel allocation module is used to allocate all video compressed signals in the data item set to the corresponding sub-channels according to the data stream size, so that the data stream size of the data item set is equal to the transmission bearing capacity of the corresponding sub-channel. adapt; The transmission module is used for allocating corresponding scheduling time slots for all transmission links according to the link time slot allocation method, allocating multiple sub-channels to the transmission links of the same scheduling time slot and sending video compression signals to the video terminal. 7. The video signal transmission system with adjustable channel frequency according to claim 6, wherein the data division module specifically comprises: The data stream acquisition module is used to acquire the data stream size of each video compression signal; The division module is used to compare the data stream size of each video compressed signal with the preset capacity ranges of multiple data streams, and divide the video compressed signals within the capacity range of each data stream into a data item set to obtain multiple data streams. A collection of data items. 8. The video signal transmission system with adjustable channel frequency according to claim 6, wherein the transmission module specifically comprises: The conflict judgment module is used to traverse all the transmission links, and judge whether the two transmission links generate conflict interference when they transmit in parallel at the same time. The two transmission links are determined to be conflicting links with each other; a first time slot allocation module, configured to allocate different scheduling time slots to transmission links that are conflicting links; The second time slot allocation module is configured to allocate the same scheduling time slot to the transmission links that are not conflicting links, and the number of transmission links in the same scheduling time slot is within the preset maximum limit of the number of links and the minimum limit; The third time slot allocation module is used for allocating new time slots to the remaining transmission links in sequence according to the time sequence when all the scheduling time slot allocations are completed; The channel transmission module is used for queuing transmission of each video compressed signal in the corresponding sub-channel according to the preset priority order, and assigning multiple sub-channels to the transmission link of the same scheduling time slot and concurrently sending the video compressed signal to the transmission link. video terminal. 9. The video signal transmission system with adjustable channel frequency according to claim 6, characterized in that, further comprising: The wireless transmission module is used to transmit the compressed video signal to the video terminal based on the Zig-Bee wireless communication technology. 10. The video signal transmission system with adjustable channel frequency according to claim 6, characterized in that, further comprising: A channel building module for building a data sharing channel among all video terminals using a key sharing transmission algorithm; The shared data transmission module is used for intercepting and copying the shared data of the video terminal for data transmission, judging whether the transmission status of the required video terminal is idle, and if the transmission status of the required video terminal is idle, then transmitting the shared data to the Video terminal is required.

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