CN102883109B - Video signal sending device, receiving device, transmission system and method thereof - Google Patents

Abstract

An image signal sending device includes: two or more video adjustment units, each video adjustment unit is used to receive image signals with more than one original frame rate output by each image device, and adjust each original frame rate of each image signal to more than one new frame rate; and a video integration unit is used to merge each image signal into an integrated image signal with each original frame rate or each new frame rate, and send the integrated image signal to a remote device through a sending channel, wherein the sum of the new frame rates of each image signal is less than or equal to the maximum frame rate within the bandwidth range of the sending channel, thereby improving the transmission efficiency of the image signal.

Description

Video signal sending device, receiving device, transmission system and method thereof

technical field

The present invention relates to a signal transmission system, and in particular to an image signal sending device, a receiving device, a transmission system and a method thereof.

Background technique

With the consideration of usage requirements and operating environment, more and more users often use a multi-video source switching system to meet more usage requirements when playing video signals. The architecture of the multi-image source switching system generally includes multiple input terminals, switching circuits and multiple output terminals. Each input end is connected to an image playback device, and each output end is connected to a display device (such as a screen, a projector, etc.), and the image playback device is selected through a switching circuit to provide an image source to the display device, so that the display device displays the display device for viewing. video content.

When the user wants to transmit multiple video signals to a remote place, the Internet is often used as the transmission medium. However, due to the huge data size of each video signal, if it is directly sent on the Internet without image compression, it will definitely make the original The Internet, already limited in bandwidth, is even more immobile. Therefore, in order to transmit multiple image signals on the Internet with limited bandwidth, common methods include lossless compression and distortion compression. The above two compression methods mainly compress the video signal before transmission at the sending end to reduce the data bandwidth occupied by the transmission of multiple video signals, and use the corresponding decompression method at the receiving end to compress the aforementioned multiple video signal restoration.

Among them, if the image signal is processed by the lossless compression method, although the restored image signal is almost distortion-free, each image signal occupies a relatively large data transmission bandwidth, so it is limited by the relationship between the transmission bandwidth, resulting in The number of images that can be transmitted is relatively limited. If the image signal is processed by the distortion compression method, although the data transmission bandwidth occupied by each image signal is relatively small, the number of images that can be transmitted can be relatively increased, but the restored image signal will inevitably be distorted.

Therefore, the aforementioned compression methods may have troublesome problems. How to provide an image signal transmission system has become one of the problems that researchers are currently waiting to solve.

Contents of the invention

Embodiments of the present invention provide an image signal sending device, receiving device, transmission system and method thereof, by adjusting the frame rate of the image signal during transmission to reduce the data capacity of the image signal, and using the original transmission line to increase the number of transmitted image signals quantity. If the network transmission line is used, the transmission of the network can be accelerated and the transmission time can be saved, thereby improving the transmission efficiency of the image signal.

The image signal sending device proposed by the present invention is connected with two or more image devices, and includes: two or more video adjustment units, each video adjustment unit is used to receive the output of each image device with a image signals with more than one original frame rate, and adjust each original frame rate of each image signal to more than one new frame rate; and a video integration unit for merging each image signal into each original frame rate or each new frame rate An integrated video signal with a frame rate, and the integrated video signal is sent to the remote through the sending channel; wherein the sum of the new frame rates of each video signal is less than or equal to the maximum frame rate within the bandwidth of the sending channel.

The image signal receiving device proposed by the present invention is connected with one or more display devices, and includes: a video separation unit, used to receive an integrated image signal with more than one original frame rate, and separate the integrated image signal into Two or more image signals with more than one new frame rate; and one or more video adjustment units, each video adjustment unit is used to respectively receive each image with each new frame rate output by the video separation unit signal, and increase or decrease each new frame rate of each image signal before outputting to each display device.

The image signal transmission system proposed by the present invention is respectively connected with two or more image devices and one or more display devices, including: two or more image signal sending devices for receiving Image signals with more than one original frame rate output by each image device, and combine each image signal into an integrated image signal with each original frame rate to send the integrated image signal; and one or more image signals receive A device for receiving integrated image signals with respective original frame rates, and separating the integrated image signals into image signals with more than one new frame rate; wherein each image signal sending device also adjusts each image signal before combining the integrated image signals Each original frame rate is each new frame rate, and each image signal receiving device separates and integrates the image signals, and then increases or decreases each new frame rate of each image signal before outputting to each display device.

The image signal transmission method proposed by the present invention is suitable for the transmission between two or more image signal sending devices and one or more image signal receiving devices, and includes the following steps: adjusting each image signal sending device through each image signal sending device More than one original frame rate of the received image signal is more than one new frame rate; each image signal with each new frame rate is combined into an integrated image signal with each original frame rate by each image signal sending device; and The integrated image signals with each original frame rate are sent to the remote through each image signal sending device.

In other words, the present invention is an image signal sending device connected to two or more image devices, wherein the image signal sending device includes:

Two or more video adjustment units, each of the video adjustment units is used to respectively receive video signals with more than one original frame rate output by each of the video devices, and adjust each video signal of each of the video signals. one or more new frame rates for the original frame rate; and

A video integration unit, used to combine each of the image signals into an integrated image signal with each of the original frame rates or each of the new frame rates, and send the integrated image signal to a remote through a transmission channel;

The sum of the new frame rates of each of the image signals is less than or equal to the maximum frame rate within the bandwidth of the transmission channel.

In the video signal sending device of the present invention, the video signal sending device is respectively disposed in each of the video devices, switches, distributors, matrixers or extenders that provide the video signals.

In the image signal sending device of the present invention, each of the image devices is a video camera, a desktop computer host, a server, a notebook computer or a video player.

In the video signal transmission device according to the present invention, the data capacity of each of the video signals, the frame rate or the type are different from each other.

In the image signal sending device of the present invention, each of the image devices has different video interfaces.

The present invention is an image signal receiving device connected to one or more display devices, wherein the image signal receiving device includes:

a video separation unit for receiving an integrated image signal with more than one original frame rate, and separating the integrated image signal into one or more image signals with more than one new frame rate; and

One or more video adjustment units, each of the video adjustment units is used to respectively receive each of the image signals with each of the new frame rates output by the video separation unit, and increase or decrease the value of each of the image signals Each of the new frame rates is then output to each of the display devices.

In the image signal receiving device of the present invention, each of the video adjustment units further adjusts each of the new frame rates of each of the image signals and each of the original frame rates.

In the video signal receiving device of the present invention, the video signal receiving devices are respectively arranged in each of the display devices, switchers, distributors, matrixers or extenders.

In the video signal receiving device of the present invention, each of the display devices has different video interfaces.

In the image signal receiving device of the present invention, the processing of the image format is added through the image signal receiving device to output to each of the display devices with different video interfaces.

In the video signal receiving device according to the present invention, the video signal receiving device further causes each of the display devices to simultaneously display the same screen or different screens.

The present invention is an image signal transmission system, which is respectively connected to two or more image devices and one or more display devices, wherein the image signal transmission system includes:

Two or more image signal sending devices, used to receive image signals with more than one original frame rate output by each of the image devices, and combine each of the image signals into one with each of the original frame rates an integrated image signal for sending the integrated image signal; and

One or more image signal receiving devices are used to receive the integrated image signal with each of the original frame rates, and separate the integrated image signal into image signals with more than one new frame rate;

Wherein each of the image signal sending devices also adjusts each of the original frame rates of each of the image signals and each of the new frame rates before combining the integrated image signals, and each of the image signal receiving devices separates the After the image signals are integrated, each new frame rate of each of the image signals is increased or decreased, and then output to each of the display devices.

In the image signal transmission system of the present invention, each of the image signal receiving devices further adjusts each of the new frame rates of each of the image signals and each of the original frame rates.

In the image signal transmission system of the present invention, the sum of the new frame rates of each of the image signals is less than or equal to the maximum frame rate within the bandwidth of the sending channel.

In the image signal transmission system of the present invention, each of the image signal sending devices is respectively disposed in each of the image devices, switches, distributors, matrixers or extenders that provide the image signals.

In the image signal transmission system of the present invention, each of the image signal receiving devices is respectively disposed in each of the display devices, switchers, distributors, matrixers or extenders.

In the image signal transmission system of the present invention, each image signal receiving device further adds image format processing to output to each of the display devices with different video interfaces.

In the image signal transmission system of the present invention, each of the display devices can display the same picture or different pictures at the same time through each of the video signal receiving devices.

The present invention is an image signal transmission method, which is suitable for transmission between two or more image signal sending devices and one or more image signal receiving devices, wherein the image signal transmission method includes the following steps :

adjusting more than one original frame rate of each received image signal to more than one new frame rate through each of the image signal sending devices;

Combining each of the image signals with each of the new frame rates into an integrated image signal with each of the original frame rates by each of the image signal sending devices; and

The integrated image signals with each of the original frame rates are sent to a remote location through each of the image signal sending devices and a sending channel.

In the image signal transmission method of the present invention, the sum of the new frame rates of each of the image signals is less than or equal to the maximum frame rate within the bandwidth of the sending channel.

The image signal transmission method of the present invention, wherein, after the step of sending the integrated image signal with each of the original frame rates to the remote, further includes:

receiving the integrated image signals with each of the original frame rates by each of the multi-image signal receiving devices;

separating the integrated image signals with each of the original frame rates into each of the image signals with each of the new frame rates by each of the image signal receiving devices; and

Each of the new frame rates of each of the image signals is increased or decreased by each of the image signal receiving devices, and then output to each of the display devices.

In the image signal transmission method of the present invention, each image signal receiving device further adds image format processing to output to each of the display devices with different video interfaces.

In the video signal transmission method of the present invention, each of the video signal receiving devices further enables each of the display devices to simultaneously display the same picture or different pictures.

To sum up, the present invention can perform image signal transmission under the original transmission bandwidth, mainly by adjusting the frame rate of each image signal at the sending end and combining them to reduce the data capacity of each image signal during transmission. Then carry out the image signal transmission operation, and restore the frame rate of each image signal at the receiving end to output to the display device, thereby improving the transmission efficiency of the image signal and relatively increasing the availability of the transmission bandwidth. In addition, it can also avoid Data loss occurs during transmission, which affects the output quality of video signals.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the attached drawings are only for reference and description, and are not intended to limit the present invention.

Description of drawings

FIG. 1A is a schematic diagram of image signal transmission in the present invention.

FIG. 1B is another schematic diagram of image signal transmission according to the present invention.

FIG. 2 is a system block diagram of the video signal sending device of the present invention.

FIG. 3 is a system block diagram of the video signal receiving device of the present invention.

FIG. 4 is a system block diagram of the image signal transmission system of the present invention.

Fig. 5 is a flow chart of the method of the present invention.

Explanation of reference signs

11 First computer system

112 Operation interface

114 The first host connection unit

116 Second host connection unit

12 Second computer system

108 processing units

1041 The first video adjustment unit

1042 Second video adjustment unit

1043 Video Integration Unit

14 First display device

112a Operator interface

114a First display connection unit

116a Second display connection unit

16 Second display device

108a processing unit

1041a First video adjustment unit

1042a Second video adjustment unit

1043a Video Separation Unit

150 video signal sending device

200 video signals

200a First video signal

200b Second video signal

210 First video signal

210a First video signal

210b Second video signal

210c Third video signal

300 video signal receiving device

400 video signal transmission system

S510～S521 flowchart step description

detailed description

(Example of image transmission)

Please refer to FIG. 1A , which is a schematic diagram of image signal transmission in the present invention. The image signal transmission system in FIG. 1A includes an image signal sending device 150 and an image signal receiving device 300 . The transmission channel between the video signal sending device 150 and the video signal receiving device 300 transmits two video signals in total. The transmission channel may use the original transmission line, or other Internet transmission media such as CAT 5 twisted pair cable or optical fiber, or a bus. In addition, the transmission quantity of the image signals may be two or more, and the data capacity, frame rate or type of the image signals may be different.

The image signal sending device 150 can execute an adjustment program to adjust the original frame rate of the received image signal. The image signal receiving device 300 can execute a demodulation process to receive and restore the frame rate of the image signal output by the image signal sending device 150 . The above-mentioned frame rate refers to the frame update rate, which is used to measure the number of display frames, and the measurement unit of the frame rate is the number of display frames per second (Frame per Second, FPS) or Hertz (Hz).

The video signal 200 in the sending channel includes a first video signal 200a with a first frame rate and a second video signal 200b with a second frame rate. The sum of the first frame rate of the first image signal 200a and the second frame rate of the second image signal 200b in the transmission channel may be the maximum frame rate within the bandwidth of the transmission channel, or may be the original frame rate , and the first frame rate or the second frame rate may be less than the original frame rate. In addition, if there are other design requirements, the sum of the first frame rate and the second frame rate may also be less than the original frame rate.

For example, when the video signal sending device 150 receives a first video signal with an original frame rate of 60 Hz and a second video signal with an original frame rate of 60 Hz, the adjustment procedure of the video signal sending device 150 can convert the first original frame to The first video signal with a rate of 60 Hz is adjusted to the first video signal with a first frame rate of 30 Hz. Similarly, the adjustment program of the image signal sending device 150 can adjust the second image signal with the second original frame rate of 60 Hz to the second image signal with the second frame rate of 30 Hz. At this time, the sum of the first frame rate of 30 Hz of the first video signal 200 a in the transmission channel and the second frame rate of 30 Hz of the second video signal 200 b may be the maximum frame rate within the bandwidth of the transmission channel, or may be First or second native frame rate 60Hz. In addition, the first original frame rate and the second original frame rate may be the same or different.

Next, when the video signal receiving device 300 receives the first video signal with a first frame rate of 30 Hz and the second video signal with a second frame rate of 30 Hz, the demodulation process of the video signal receiving device 300 can convert the first The first video signal with a frame rate of 30 Hz is adjusted to a first video signal with a first original frame rate of 60 Hz. Similarly, the adjustment program of the image signal receiving module 300 can adjust the second image signal with the second frame rate of 30 Hz to the second image signal with the second original frame rate of 60 Hz.

Since the frame rate is directly proportional to the data capacity, a low frame rate means low data capacity. In other words, the present invention can realize the transmission of multiple images under a limited transmission bandwidth by adjusting the transmission mode of the frame rate. In addition, since the conventional image compression processing method is not used, the output quality of the transmitted image signal is not affected.

Next, please refer to FIG. 1B , which is a schematic diagram of another image signal transmission of the present invention. The image transmission system in FIG. 1B includes an image signal sending device 150 and an image signal receiving device 300 . The transmission channel between the video signal sending device 150 and the video signal receiving device 300 transmits three video signals in total. The adjustment procedure and the demodulation procedure of the video signal sending device 150 and the video signal receiving device 300 are the same as the above principles, and will not be repeated below. In addition, the number of transmissions of the image signals may be three or more.

The video signal 210 in the sending channel includes a first video signal 210a with a first frame rate, a second video signal 210b with a second frame rate, and a third video signal 210c with a third frame rate. The sum of the above-mentioned first frame rate, second frame rate and third frame rate may be the maximum frame rate within the bandwidth of the transmission channel, or may be the original frame rate before the image signal transmission module 150 adjusts. For example, when the original frame rate is 60Hz, the first frame rate, the second frame rate and the third frame rate can be designed as 20Hz, 20Hz and 20Hz, or 40Hz, 10Hz and 10Hz, or 30Hz, 20Hz and 10Hz , or 10Hz, 40Hz, and 10Hz, and so on.

Therefore, the adjusted frame rate can be designed corresponding to the number of image signals to be transmitted. In other words, the adjustment rule may be to divide the original frame rate by the number of image signals to be transmitted to obtain the adjusted frame rate, or to subtract a specific value (for example, any integer value, and less than the original frame rate) to obtain the adjusted frame rate value, and the adjusted frame rate is preferably an integer, and the sum of the adjusted frame rates may be the maximum frame rate within the bandwidth of the sending channel, or may be Raw frame rate. In addition, the aforementioned adjustment rules are just examples, and are not limited thereto.

(Example of Video Sending Device)

Please refer to FIG. 2 . FIG. 2 is a system block diagram of the video signal sending device of the present invention. The image signal sending device 150 includes: a first host connection unit 114 , a second host connection unit 116 , a first video adjustment unit 1041 , a second video adjustment unit 1042 , a video integration unit 1043 , a processing unit 108 and an operation interface 112 .

The image signal sending device 150 is connected to the first computer system 11 through the first host connection unit 114 to receive a first image signal with a first original frame rate from the first computer system 11 . Likewise, the multi-image signal sending device 150 is connected to the second computer system 12 through the second host connection unit 116 to receive the second image signal with the second original frame rate from the second computer system 12 . The first host connection unit 114 and the second host connection unit 116 can be a digital video interface (DVI) module, a high-resolution multimedia interface (HDMI) module, a digital display port (DisplayPort, DP) or VGA video, etc. Video interface module. The first host connection unit 114 and the second host connection unit 116 may have the same or different interface specifications.

The first computer system 11 and the second computer system 12 can be video cameras, desktop computer hosts, tablet computers, servers, notebook computers, video players (such as Blu-ray players, DVD or VCD), etc. or conform to HDCP Technical installation equipment. The image signal sending device 150 can also be respectively installed in the first computer system 11 and the second computer system 12 (or other image devices, switches, splitters, matrices, extenders) (extender)). Since the above-mentioned switcher, splitter, matrixer or extender are commonly used signal processing devices, they will not be described in detail here. The first original frame rate and the second original frame rate may be the same or different.

The first video adjustment unit 1041 is connected to the first host connection unit 114 . The first video adjustment unit 1041 is used for receiving a first image signal with a first original frame rate, and adjusting the first original frame rate of the first image signal to the first frame rate. The first video adjustment unit 1041 can adopt a digital signal processing chip (DSP), a programmable logic gate array (FPGA), etc., and can be used to process image scaling (scaler) or image format conversion.

The second video adjustment unit 1042 is connected to the second host connection unit 116 . The second video adjusting unit 1042 is used for receiving the second image signal with the second original frame rate, and adjusting the second original frame rate of the second image signal to the second frame rate. The second video adjustment unit 1042 can adopt a digital signal processing chip (DSP), a programmable logic gate array (FPGA), etc., and can be used to process image scaling (scaler) or image format conversion.

The video integration unit 1043 is connected to the first video adjustment unit 1041 and the second video adjustment unit 1042 respectively. The video integration unit 1043 is used for combining the first image signal output by the first video adjustment unit 1041 and the second image signal output by the second video adjustment unit 1042 into an integrated image signal with the first or second original frame rate. The frame rate of the integrated image signal can be set by the user as the first or second original frame rate, or the frame rate value can be determined by other calculation methods. The video integration unit 1043 sends the aforementioned integrated image signal to the remote (or next-level circuit), wherein there may be a transmission connection unit (not marked) between the video integration unit 1043 and the remote, so as to transmit the output integrated image signal in the transmission format Convert to the transport format used by the sending channel. The transmission connection unit described above can be omitted if no transmission format conversion is required.

The processing unit 108 is connected to the video integration unit 1043 . The processing unit 108 can be used to control the video integration unit 1043 to execute an image signal integration program. The processing unit 108 can be a central processing unit, a microcontroller or an embedded controller, or a digital logic circuit.

The operation interface 112 is connected to the processing unit 108 . The operation interface 112 can be one or more buttons or keys, an On Screen Display (OSD) interface, an OSB interface or an infrared (IR) communication interface. The operation interface 112 can accept the user's operation to generate an operation instruction and send it to the processing unit 108 , and the processing unit 108 further sets the frame rate output by the first video adjustment unit 1041 and the second video adjustment unit 1042 according to the instruction of the operation instruction. In addition, in another embodiment of the present invention, if the fixed mode is adopted (that is, the output frame rates of the first video adjustment unit 1041 and the second video adjustment unit 1042 are fixed), the operation interface 112 can be omitted.

(An embodiment of an image receiving device)

Please refer to FIG. 3 . FIG. 3 is a system block diagram of the video signal receiving device of the present invention. Some components in the image signal receiving device 300 are the same as those in the image signal receiving device 150 , and will not be described in detail below. The image signal receiving device 300 includes: a first video adjustment unit 1041a, a second video adjustment unit 1042a, a video separation unit 1043a, a processing unit 108a, an operation interface 112a, a first display connection unit 114a and a second display connection unit 116a.

The video separation unit 1043a receives the integrated video signal with the first or second original frame rate from the remote. The remote can also refer to the upper-level circuit. Similarly, there may be a transmission connection unit (not marked) between the video separation unit 1043a and the remote, so as to convert the transmission format of the received integrated image signal to conform to the video separation unit. The transmission format used by 1043a. If there is no need to perform transmission format conversion, the transmission connection unit described above can also be omitted. The video separation unit 1043a is used for separating and integrating the video signal into a first video signal with a first frame rate and a second video signal with a second frame rate.

The first video adjustment unit 1041a is connected to the video separation unit 1043a. The first video adjustment unit 1041a receives a first video signal with a first frame rate. The first video adjustment unit 1041a may have the same function and structure as the first video adjustment unit 1041. Furthermore, the first video adjustment unit 1041a may have functions of adjusting the first video signal amplification, reduction and video format conversion. The first video adjustment unit 1041a is configured to adjust the first frame rate of the first image signal to a first original frame rate. In addition, the first video adjustment unit 1041a can also increase or decrease the first frame rate of the first image signal to other frame rates, or convert the image format according to the usage requirements of the first display device 14 .

The second video adjustment unit 1042a is connected to the video separation unit 1043a. The second video adjusting unit 1042a receives a second video signal with a second frame rate. The second video adjustment unit 1042a may have the same function and structure as the second video adjustment unit 1042. Furthermore, the second video adjustment unit 1042a may have the functions of adjusting the amplification, reduction and image format conversion of the second video signal. The second video adjustment unit 1042a is configured to adjust the second frame rate of the second image signal to the second original frame rate. In addition, the second video adjustment unit 1042a can also increase or decrease the second frame rate of the second image signal to other frame rates, or convert the image format according to the usage requirements of the first display device 14 or the second display device 16 .

The processing unit 180a is connected to the video separation unit 1043a. The processing unit 108a can be used to control the video separation unit 1043 to execute the image signal separation process. The operation interface 112a is connected to the processing unit 108a. The operation interface 112a can accept the user's operation to generate an operation command and send it to the processing unit 108a, and the processing unit 108a further sets the frame rate output by the first video adjustment unit 1041a and the second video adjustment unit 1042a according to the instruction of the operation command, The first video adjustment unit 1041a and the second video adjustment unit 1042a can output corresponding image signals at the same time, or alternately output corresponding image signals, or simultaneously select and output the same image signal. In addition, in another embodiment of the present invention, if the fixed mode is adopted (that is, the output frame rates of the first video adjustment unit 1041a and the second video adjustment unit 1042a are fixed), the operation interface 112a can be omitted.

The first display connection unit 114a is connected to the first video adjustment unit 1041a. The second display connection unit 116a is connected to the second video adjustment unit 1042a. The first display connection unit 114a and the second display connection unit 116a can be digital video interface (DVI) module, high-resolution multimedia interface (HDMI) module, digital display port (Display Port, DP) or other video interfaces such as VGA video module. The first display connection unit 114a and the second display connection unit 116a may have the same or different interface specifications. In addition, the first display connection unit 114a and the second display connection unit 116a can be connection slots (sockets) corresponding to the interface modules, respectively used to connect corresponding connection plugs with the same interface to electrically connect to the first display device 14 and the second display device 16 .

The image receiving device 300 is connected to the first display device 14 through the first display connection unit 114 a to transmit the first image signal to the first display device 14 for display. Similarly, the image signal receiving device 300 is connected to the second display device 16 through the second display connection unit 116a, so as to transmit the second image signal to the second display device 16 for display. The first display device 14 and the second display device 16 can be image output devices such as televisions, projectors, CRT screens or liquid crystal screens. The image signal receiving device 300 may also be respectively disposed in the first display device 14 and the first display device 16 (or other display devices, switchers, distributors, matrixers, and extenders). In addition, in the embodiment of the image receiving device, a set of video adjustment units, a set of display connection units, and a set of display devices can be used according to usage requirements.

It is worth mentioning that the image signal receiving device 300 can also add image format processing to output to the first display device 14 and the second display device 16 with different video interfaces. In addition, through the image signal receiving device 300 , the first display device 14 and the second display device 16 can simultaneously display the same picture or different pictures.

(Example of image transmission system)

Next, please refer to FIG. 4 , which is a system block diagram of the image signal transmission system of the present invention. The image signal transmission system 400 in FIG. 4 is respectively connected to two computer systems (namely the first computer system 11 and the second computer system 12 ) and two display devices (namely the first display device 14 and the second display device 16 ). The image signal transmission system 400 includes an image signal sending device 150 and an image signal receiving device 300 . The image signal sending device 150 and the image signal receiving device 300 can be integrated together on a circuit board or a set-top box. Since the operation principles of the video signal sending device 150 and the video signal receiving device 300 have been described respectively in FIG. 2 and FIG. 3 , they will not be repeated below. In addition, in principle, the number of video adjustment units in the image signal sending device 150 and the image signal receiving device 300 are relatively equal, but if there are other design considerations, the number of video adjustment units in the image signal receiving device 300 can be increased or decreased .

The video integration unit 1043 and the video separation unit 1043 are connected to each other through a sending channel or a bus. The processing unit 108 is connected to the video integration unit 1043 and the video separation unit 1043 respectively. The processing unit 108 can be used to control the video integration unit 1043 to execute the image signal integration procedure, and the processing unit 108 can be used to control the video separation unit 1043 to execute the image signal separation procedure.

The operation interface 112 can accept the user's operation to generate an operation instruction and send it to the processing unit 108, and the processing unit 108 further sets the first video adjustment unit 1041, the second video adjustment unit 1042, the first video adjustment unit 1041, The frame rate output by the unit 1041a and the second video adjustment unit 1042a. In addition, the number of connections between the computer system and the display device connected to the image signal transmission device 400 in the present invention is only for illustration, and is not intended to limit the number of connections between the computer system and the display device. When there are more than two computer systems, the number of host connection units and video adjustment units should be correspondingly increased. In addition, when there are one or more display devices, the number of video adjustment units and display connection units should be correspondingly reduced or increased.

Please refer to FIG. 4 and FIG. 5 at the same time. FIG. 5 is a flow chart of the method for image signal transmission of the present invention. First, in step S510, the image signal sending device 150 receives the first image signal and the second image signal with the first original frame rate, and adjusts the first original frame rate of the first image signal to the first frame rate. , and the second original frame rate of the second image signal is a second frame rate. The first frame rate and the second frame rate may be lower than the first or second original frame rate, thereby reducing the data capacity corresponding to the first image signal and the second image signal. The user can set the first frame rate and the second frame rate of the image signal sending device 150 through the operation interface 112 . The first and second original frame rates may be the same or different.

Next, in step S513, the image signal sending device 150 combines the adjusted first image and the second image into an integrated image signal with the first or second original frame rate, wherein the sum of the first frame rate and the second frame rate It may be less than or equal to the maximum frame rate within the bandwidth range of the sending channel, or the first or second original frame rate. In step S515 , the image signal sending device 150 can output or send the integrated image signal with the maximum frame rate, or the first or second original frame rate, to the remote (or next-level circuit) through the sending channel. In step S517, the image signal receiving device 300 may receive the integrated image signal with the maximum frame rate or the first or second original frame rate from a remote (or upper-level circuit) through the sending channel.

Next, in step S519, the image signal receiving device 300 separates the integrated image signal with the maximum frame rate, or the first or second original frame rate, into the first image signal with the first frame rate and the second frame rate. The frame rate of the second image signal. In step S521 , the video signal receiving device 300 adjusts a first frame rate of the first video signal to a first original frame rate, and a second frame rate of the second video signal to a second original frame rate. In another embodiment of the present invention, the video signal receiving device 300 may increase or decrease the first frame rate of the first video signal to other frame rates (which may be any integer value) before outputting to the first display device 14 . In addition, image format processing can be added through the image signal receiving device 300 to output to the first display device 14 or the second display device 16 with different video interfaces. The first display device 14 and the second display device 16 have the same or different video interfaces depending on usage requirements.

Similarly, in another embodiment of the present invention, the image signal receiving device 300 can increase or decrease the second frame rate of the second image signal to other frame rates (which can be any integer value) and then output it to the second display device 16 . In addition, through the image signal receiving device 300 , the first display device 14 and the second display device 16 can simultaneously display the same picture or different pictures. The user can set the first frame rate and the second frame rate of the image signal receiving device 300 through the operation interface 112 . In this embodiment, the transmission of two image signals is used for illustration, and it is not limited thereto. In other words, the number of image signals transmitted can be two or more, and the data capacity, frame Rate or type may vary.

To sum up, the present invention can perform image signal transmission operations under the original transmission bandwidth, mainly by first adjusting the frame rate of the image signals at the sending end and combining them, so as to reduce the data capacity during image signal transmission. Then carry out the image signal transmission operation, and restore the frame rate of the image signal at the receiving end to output to the display device, thereby improving the transmission efficiency of the image signal, and relatively increasing the availability of the transmission bandwidth. In addition, it can also avoid transmission Occasionally, data loss occurs and affects the image signal output quality.

Although the disclosed embodiments of the present invention are described above, these embodiments are for illustration only and should not be construed as limitations on the practice of the present invention. Without departing from the essential scope of the present invention, other modifications or changes all belong to the protection scope of the present invention.

Claims (9)

1. a signal of video signal transmission system, is connected with two or more device for image respectively, and plural Display device connects, it is characterised in that described signal of video signal transmission system includes:

Two or more image signal transmitting devices, described image signal transmitting device includes two or more First video adjustment unit and a video integral unit；

Each described first video adjustment unit in order to receive respectively each described device for image output there is the original of more than one The signal of video signal of picture update rate, and each described raw frames turnover rate adjusting each described signal of video signal is the new of more than one Picture update rate；

Described video integral unit, the signal of video signal in order to merge each described first video adjustment unit output is each described for having Raw frames turnover rate or an integration signal of video signal of each described new picture update rate, and send described whole by a sendaisle Close signal of video signal, the wherein summation of each described new picture update rate of the signal of video signal of each described first video adjustment unit output Less than or equal to the maximum picture update rate in the range of the frequency range of described sendaisle；And

More than one video signal receiving apparatus, described video signal receiving apparatus include a video separation unit and two and Plural second video adjustment unit；

Described video separation unit, in order to receiving this integration signal of video signal, and it is new for being respectively provided with to separate this integration signal of video signal The plural signal of video signal of picture update rate；And

Each described video adjustment unit in order to receive respectively described video separation unit output there is each described new frame updating The each described signal of video signal of rate, and export to each institute after promoting or reducing each described new picture update rate of each described signal of video signal State display device.

2. signal of video signal according to claim 1 transmission system, it is characterised in that each described video signal receiving apparatus is also The each described new picture update rate adjusting each described signal of video signal is each described raw frames turnover rate.

3. signal of video signal according to claim 1 transmission system, it is characterised in that each described image signal transmitting device divides It is not arranged in each described device for image of each described signal of video signal, switch, distributor, matrix device or stretcher are provided.

4. signal of video signal according to claim 1 transmission system, it is characterised in that each described video signal receiving apparatus divides It is not arranged in each described display device, switch, distributor, matrix device or stretcher.

5. signal of video signal according to claim 1 transmission system, it is characterised in that receive dress by each described signal of video signal Put the process also increasing image format to export to each described display device with different video interface.

6. signal of video signal according to claim 1 transmission system, it is characterised in that receive dress by each described signal of video signal Put and also make each described display device show the same picture or different pictures simultaneously.

7. an image signal transmission method, it is adaptable to two or more image signal transmitting devices with more than one Transmission between video signal receiving apparatus, it is characterised in that described image signal transmission method includes the following step:

By the two or more first video adjustment units in each described image signal transmitting device in order to connect respectively Receive the signal of video signal of the raw frames turnover rate with more than one of two or more device for image output, and adjust More than one raw frames turnover rate of the signal of video signal each being received is more than one new picture update rate；

Merge each described first video adjustment unit by the video integral unit in each described image signal transmitting device defeated The signal of video signal going out is an integration signal of video signal with each described raw frames turnover rate or each described new picture update rate；

Sent by each described image signal transmitting device and a sendaisle and there is described integration signal of video signal to remotely；And

Separate described integration signal of video signal by the video separation unit in described video signal receiving apparatus for having respectively There is the plural described signal of video signal of new picture update rate；

By two in described video signal receiving apparatus and plural second video adjustment unit in order to receive respectively The each described signal of video signal with each described new picture update rate of described video separation unit output, and promote or reduce each institute After stating each described new picture update rate of signal of video signal, output is to multiple display devices；

Wherein the summation of each described new picture update rate of the signal of video signal of each described first video adjustment unit output is less than Maximum picture update rate in the range of the frequency range of described sendaisle.

8. image signal transmission method according to claim 7, it is characterised in that receive dress by each described signal of video signal Put the process also increasing image format to export to each described display device with different video interface.

9. image signal transmission method according to claim 7, it is characterised in that receive dress by each described signal of video signal Put and also make each described display device show the same picture or different pictures simultaneously.