How large LED screens process image signals

LED display is a digital flat panel display. This requires it to be able to display text, graphics, animations, images, video programs and other information. The purpose of full-color LED display is to create a giant color display. Large LED display has many similarities with flat panel displays such as plasma display and large-screen rear projection TV.

In comparison, LED may be more difficult than other flat panel displays in data distribution, driving, reducing power consumption, improving efficiency, color reproduction and consistency. This is because light-emitting diodes are inert devices, the switching time is nanoseconds, and there is no memory function. In addition, due to the large display area and long signal transmission distance, it cannot be manufactured using the most advanced COG, SOB and other large-scale integrated circuit methods. The following is a brief introduction to the processing of image signals by LED display screens.

There are generally two ways for LED displays to process image signals:

One method is to use a dedicated large-screen signal processor to convert the interlaced TV signal into a progressive scan signal after processing, and then play it on the large screen. High-performance processors can process more than 10 bits. When doing scan conversion, interpolation operations, motion prediction and compensation, and scan conversion are required. Now high-end large LED screens also use this method and perform more image signal processing, trying to upgrade the signal to broadcast level, and of course the effect is better. Computer images must also be processed by this processor and then sent to the large screen for display. Processing technology is still developing, and many new algorithms have been proposed. The large-size rear projection TV and plasma large-screen TV that we are familiar with are widely used in this method, and the effect is much better than ordinary TV. In this case, the output signal is usually described according to the converted signal format, which appears to be more accurate.

Another method is the multimedia method, usually called the synchronous screen method. This method uses an ordinary multimedia card to capture TV signals and perform demodulation, filtering, and sound and color separation. After the image signal is converted by A/D, it is compressed by MPEG encoding for storage. It is decompressed again during playback and viewed directly on the computer monitor. The signal sent to the large screen is obtained from the computer's DVI interface or graphics card through a dedicated adapter card, and some processing is required on the adapter card. At this time, the large screen is actually equivalent to the computer monitor or a part of it, usually called a window, which can achieve one-to-one synchronous display. Since the computer monitor is scanned line by line, if the signal is not processed by frame extraction, then the display format of the large screen is the format of the monitor.

For example, the VGA format is a progressive scan format with a pixel count of 640x480 and a scan update rate of 75Hz. However, the 75Hz progressive scan signal here is not an improvement in the image source itself, and the image quality has not been improved. In fact, it is worse than the 50Hz interlaced scan level, similar to the effect of DVD or VCD. This is where confusion often occurs. As for some screens that perform screen swapping, for example, discarding even-numbered screen information and only sending odd-numbered screen information for display, the effect is of course worse. By the way, the situation of non-image programs is relatively simple. Although some game animations also require good continuity, for animations played on large screens, a screen update rate of more than 10Hz is acceptable.

The display screen controlled by an embedded controller or a single-chip microcomputer, the program is generated by the controller, and the speed of providing the picture is not fast enough due to the limitation of the processing power of the controller, which will cause the picture to be discontinuous. The most typical phenomenon is that the bar screen controlled by the single-chip microcomputer is not smooth but jumpy when the text moves left or right. Experience and calculation can show that if a bar screen composed of 10 16XI6 dot matrix Chinese characters is to move left at a speed of 5 seconds, its frame frequency must reach more than 15Hz in order to move smoothly and continuously. The LED display screen is a digital flat-panel display. This requires it to display various information such as text, graphics, animation, images, and video programs. The purpose of the full-color LED display screen is to create a giant color display. Large LED displays have many similarities with flat-panel displays such as plasma displays and large-screen rear projection TVs.

In comparison, LED may be more difficult than other flat panel displays in data distribution, driving, reducing power consumption, improving efficiency, color reproduction and consistency. This is because light-emitting diodes are inert devices, the switching time is nanoseconds, and there is no memory function. In addition, due to the large display area and long signal transmission distance, it cannot be manufactured using the most advanced COG, SOB and other large-scale integrated circuit methods. The following is a brief introduction to the processing of image signals by LED display screens.

There are generally two ways for LED displays to process image signals:

One method is to use a dedicated large-screen signal processor to convert the interlaced TV signal into a progressive scan signal after processing, and then play it on the large screen. High-performance processors can process more than 10 bits. When doing scan conversion, interpolation operations, motion prediction and compensation, and scan conversion are required. Now high-end large LED screens also use this method and perform more image signal processing, trying to upgrade the signal to broadcast level, and of course the effect is better. Computer images must also be processed by this processor and then sent to the large screen for display. Processing technology is still developing, and many new algorithms have been proposed. The large-size rear projection TV and plasma large-screen TV that we are familiar with are widely used in this method, and the effect is much better than ordinary TV. In this case, the output signal is usually described according to the converted signal format, which appears to be more accurate.

Another method is the multimedia method, usually called the synchronous screen method. This method uses an ordinary multimedia card to capture TV signals and perform demodulation, filtering, and sound and color separation. After the image signal is converted by A/D, it is compressed by MPEG encoding for storage. It is decompressed again during playback and viewed directly on the computer monitor. The signal sent to the large screen is obtained from the computer's DVI interface or graphics card through a dedicated adapter card, and some processing is required on the adapter card. At this time, the large screen is actually equivalent to the computer monitor or a part of it, usually called a window, which can achieve one-to-one synchronous display. Since the computer monitor is scanned line by line, if the signal is not processed by frame extraction, then the display format of the large screen is the format of the monitor.

For example, the VGA format is a progressive scan format with a pixel count of 640x480 and a scan update rate of 75Hz. However, the 75Hz progressive scan signal here is not an improvement in the image source itself, and the image quality has not been improved. In fact, it is worse than the 50Hz interlaced scan level, similar to the effect of DVD or VCD. This is where confusion often occurs. As for some screens that perform screen swapping, for example, discarding even-numbered screen information and only sending odd-numbered screen information for display, the effect is of course worse. By the way, the situation of non-image programs is relatively simple. Although some game animations also require good continuity, for animations played on large screens, a screen update rate of more than 10Hz is acceptable.

The display screen controlled by an embedded controller or a single-chip microcomputer, the program is generated by the controller, and the speed of providing the picture is not fast enough due to the limitation of the processing power of the controller, which will cause the picture to be discontinuous. The most typical phenomenon is that the bar screen controlled by the single-chip microcomputer is not smooth but jumpy when the text moves left or right. Experience and calculation can show that if a bar screen composed of 10 16XI6 dot matrix Chinese characters is to move left at a speed of 5 seconds, its frame frequency must reach more than 15Hz in order to move smoothly and continuously. The LED display screen is a digital flat-panel display. This requires it to display various information such as text, graphics, animation, images, and video programs. The purpose of the full-color LED display screen is to create a giant color display. Large LED displays have many similarities with flat-panel displays such as plasma displays and large-screen rear projection TVs.

In comparison, LED may be more difficult than other flat panel displays in data distribution, driving, reducing power consumption, improving efficiency, color reproduction and consistency. This is because light-emitting diodes are inert devices, the switching time is nanoseconds, and there is no memory function. In addition, due to the large display area and long signal transmission distance, it cannot be manufactured using the most advanced COG, SOB and other large-scale integrated circuit methods. The following is a brief introduction to the processing of image signals by LED display screens.

There are generally two ways for LED displays to process image signals:

LED display is a digital flat panel display. This requires it to be able to display text, graphics, animations, images, video programs and other information. The purpose of full-color LED display is to create a giant color display. Large LED display has many similarities with flat panel displays such as plasma display and large-screen rear projection TV.

In comparison, LED may be more difficult than other flat panel displays in data distribution, driving, reducing power consumption, improving efficiency, color reproduction and consistency. This is because light-emitting diodes are inert devices, the switching time is nanoseconds, and there is no memory function. In addition, due to the large display area and long signal transmission distance, it cannot be manufactured using the most advanced COG, SOB and other large-scale integrated circuit methods. The following is a brief introduction to the processing of image signals by LED display screens.

LED display is a digital flat panel display. This requires it to be able to display text, graphics, animations, images, video programs and other information. The purpose of full-color LED display is to create a giant color display. Large LED display has many similarities with flat panel displays such as plasma display and large-screen rear projection TV.

In comparison, LED may be more difficult than other flat panel displays in data distribution, driving, reducing power consumption, improving efficiency, color reproduction and consistency. This is because light-emitting diodes are inert devices, the switching time is nanoseconds, and there is no memory function. In addition, due to the large display area and long signal transmission distance, it cannot be manufactured using the most advanced COG, SOB and other large-scale integrated circuit methods. The following is a brief introduction to the processing of image signals by LED display screens.

There are generally two ways for LED displays to process image signals:

One method is to use a dedicated large-screen signal processor to convert the interlaced TV signal into a progressive scan signal after processing, and then play it on the large screen. High-performance processors can process more than 10 bits. When doing scan conversion, interpolation operations, motion prediction and compensation, and scan conversion are required. Now high-end large LED screens also use this method and perform more image signal processing, trying to upgrade the signal to broadcast level, and of course the effect is better. Computer images must also be processed by this processor and then sent to the large screen for display. Processing technology is still developing, and many new algorithms have been proposed. The large-size rear projection TV and plasma large-screen TV that we are familiar with are widely used in this method, and the effect is much better than ordinary TV. In this case, the output signal is usually described according to the converted signal format, which appears to be more accurate.

Another method is the multimedia method, usually called the synchronous screen method. This method uses an ordinary multimedia card to capture TV signals and perform demodulation, filtering, and sound and color separation. After the image signal is converted by A/D, it is compressed by MPEG encoding for storage. It is decompressed again during playback and viewed directly on the computer monitor. The signal sent to the large screen is obtained from the computer's DVI interface or graphics card through a dedicated adapter card, and some processing is required on the adapter card. At this time, the large screen is actually equivalent to the computer monitor or a part of it, usually called a window, which can achieve one-to-one synchronous display. Since the computer monitor is scanned line by line, if the signal is not processed by frame extraction, then the display format of the large screen is the format of the monitor.

For example, the VGA format is a progressive scan format with a pixel count of 640x480 and a scan update rate of 75Hz. However, the 75Hz progressive scan signal here is not an improvement in the image source itself, and the image quality has not been improved. In fact, it is worse than the 50Hz interlaced scan level, similar to the effect of DVD or VCD. This is where confusion often occurs. As for some screens that perform screen swapping, for example, discarding even-numbered screen information and only sending odd-numbered screen information for display, the effect is of course worse. By the way, the situation of non-image programs is relatively simple. Although some game animations also require good continuity, for animations played on large screens, a screen update rate of more than 10Hz is acceptable.

The display screen controlled by an embedded controller or a single-chip microcomputer, the program is generated by the controller, and the speed of providing the picture is not fast enough due to the limitation of the processing power of the controller, which will cause the picture to be discontinuous. The most typical phenomenon is that the text of the strip screen controlled by the single-chip microcomputer is not smooth but jumpy when it moves left or right. Experience and calculation can show that if a strip screen composed of 10 16XI6 dot matrix Chinese characters is to move left at a speed of 5 seconds, its frame frequency must reach more than 15Hz in order to move smoothly and continuously. There are generally two ways for LED display screens to process image signals:

One method is to use a dedicated large-screen signal processor to convert the interlaced TV signal into a progressive scan signal after processing, and then play it on the large screen. High-performance processors can process more than 10 bits. When doing scan conversion, interpolation operations, motion prediction and compensation, and scan conversion are required. Now high-end large LED screens also use this method and perform more image signal processing, trying to upgrade the signal to broadcast level, and of course the effect is better. Computer images must also be processed by this processor and then sent to the large screen for display. Processing technology is still developing, and many new algorithms have been proposed. The large-size rear projection TV and plasma large-screen TV that we are familiar with are widely used in this method, and the effect is much better than ordinary TV. In this case, the output signal is usually described according to the converted signal format, which appears to be more accurate.

Another method is the multimedia method, usually called the synchronous screen method. This method uses an ordinary multimedia card to capture TV signals and perform demodulation, filtering, and sound and color separation. After the image signal is converted by A/D, it is compressed by MPEG encoding for storage. It is decompressed again during playback and viewed directly on the computer monitor. The signal sent to the large screen is obtained from the computer's DVI interface or graphics card through a dedicated adapter card, and some processing is required on the adapter card. At this time, the large screen is actually equivalent to the computer monitor or a part of it, usually called a window, which can achieve one-to-one synchronous display. Since the computer monitor is scanned line by line, if the signal is not processed by frame extraction, then the display format of the large screen is the format of the monitor.

For example, the VGA format is a progressive scan format with a pixel count of 640x480 and a scan update rate of 75Hz. However, the 75Hz progressive scan signal here is not an improvement in the image source itself, and the image quality has not been improved. In fact, it is worse than the 50Hz interlaced scan level, similar to the effect of DVD or VCD. This is where confusion often occurs. As for some screens that perform screen swapping, for example, discarding even-numbered screen information and only sending odd-numbered screen information for display, the effect is of course worse. By the way, the situation of non-image programs is relatively simple. Although some game animations also require good continuity, for animations played on large screens, a screen update rate of more than 10Hz is acceptable.

The display screen controlled by an embedded controller or a single-chip microcomputer, the program is generated by the controller, and the speed of providing the picture is not fast enough due to the limitation of the processing capacity of the controller, which will cause the picture to be discontinuous. The most typical phenomenon is that the bar screen controlled by the single-chip microcomputer is not smooth but jumpy when the text moves left or right. Experience and calculation can show that if a bar screen composed of 10 16XI6 dot matrix Chinese characters is to move left at a speed of 5 seconds, its frame frequency must reach more than 15Hz in order to move smoothly and continuously. One method is to use a dedicated large-screen signal processor to convert the interlaced TV signal into a progressive scan signal after processing, and then play it on the large screen. The high-performance processor can process more than 10 bits of bits. When doing scan conversion, interpolation calculations, motion prediction and compensation, and scan conversion must be performed. Now high-end large LED screens also use this method, and perform more image signal processing, trying to upgrade the signal to the broadcast level, of course, the effect is better. Computer images must also be processed by this processor and then sent to the large screen for display. Processing technology is still developing, and many new algorithms have been proposed. The large-size rear projection TV and plasma large-screen TV we are familiar with use this method extensively, and the effect is much better than that of ordinary TV. In this case, the output signal is usually described in the transformed signal format, which is more accurate.

Another method is the multimedia method, usually called the synchronous screen method. This method uses an ordinary multimedia card to capture TV signals and perform demodulation, filtering, and sound and color separation. After the image signal is converted by A/D, it is compressed by MPEG encoding for storage. It is decompressed again during playback and viewed directly on the computer monitor. The signal sent to the large screen is obtained from the computer's DVI interface or graphics card through a dedicated adapter card, and some processing is required on the adapter card. At this time, the large screen is actually equivalent to the computer monitor or a part of it, usually called a window, which can achieve one-to-one synchronous display. Since the computer monitor is scanned line by line, if the signal is not processed by frame extraction, then the display format of the large screen is the format of the monitor.

For example, the VGA format is a progressive scan format with a pixel count of 640x480 and a scan update rate of 75Hz. However, the 75Hz progressive scan signal here is not an improvement in the image source itself, and the image quality has not been improved. In fact, it is worse than the 50Hz interlaced scan level, similar to the effect of DVD or VCD. This is where confusion often occurs. As for some screens that perform screen swapping, for example, discarding even-numbered screen information and only sending odd-numbered screen information for display, the effect is of course worse. By the way, the situation of non-image programs is relatively simple. Although some game animations also require good continuity, for animations played on large screens, a screen update rate of more than 10Hz is acceptable.

The display screen controlled by an embedded controller or a single-chip microcomputer, the program is generated by the controller, and the speed of providing the picture is not fast enough due to the limitation of the processing power of the controller, which will cause the picture to be discontinuous. The most typical phenomenon is that when the text of the strip screen controlled by the single-chip microcomputer moves left or right, it is not smooth but jumpy. Experience and calculation can show that if a strip screen composed of 10 16XI6 dot matrix Chinese characters is to move left at a speed of 5 seconds, its frame frequency must reach above 15Hz in order to move smoothly and continuously.