Inexpensive hdmi extension cable marketing for image transmission

In general, the short distance to use VGA cable is more economical, the following from the cable price and supporting equipment cost of two aspects of analysis:• Cable price: The price of short distance ordinary VGA cable is generally cheaper. Taking the length of 1.5 meters as an example, the ordinary VGA cable is as low as about 1.5 yuan on the Alibaba platform, even the products of well-known brands such as Green Link, the price is only 12.9 yuan. The same length of HDMI cable, the price of ordinary products is more than 2.8 yuan, and the price of well-known brands is usually more than 15 yuan.• Cost of supporting equipment: VGA cable only transmits video signals, if the device also needs audio output, it needs to be equipped with additional audio cable, but the price of audio cable is relatively low. If you use an HDMI cable, although it can transmit audio and video signals at the same time, if the device itself is not compatible with the HDMI interface, you may need to buy accessories such as HDMI adapters, which will increase the cost.Therefore, only considering short-distance transmission and the picture quality requirements are not extremely high, VGA cable has more advantages in price and is a more economical choice. However, if the device has requirements for audio and video synchronous transmission, or the pursuit of higher picture quality and signal stability, even for short distances, HDMI cable is a better choice, but the cost will be slightly higher.

The price difference between VGA cable and HDMI cable is not particularly large, but it will vary in different scenarios, as follows:• Basic short length cable: In general, about 1.5 meters of ordinary VGA cable and HDMI cable prices are similar. For example, on Alibaba's platform, the price of an ordinary 1.5-meter VGA cable may be around 1.5 yuan to 6 yuan. The same length of HDMI 2.0 version of the cable, the price is between 2.8 yuan and 31 yuan, but the low-cost products are usually more ordinary materials. If it is the basic model of a well-known brand, the price of the two is not much different, like thegreen 1.5 meters VGA cable discount price is 12.9 yuan, the same length of HDMI cable price will be more than 15 yuan.• High-end and special needs cables: For some cables with special functions or higher performance requirements, the price of HDMI cables may be higher than that of VGA cables. For example, VGA cable with anti-interference performance, water and dust resistance and other additional functions, the price may reach more than 150 yuan. If the HDMI cable is to support higher resolution such as 8K HDMI 2.1 version, or is better quality, with signal enhancement products, the price will increase accordingly. For example, Yamazawa's HDMI 2.1 HD line, 0.5 meters to the hand price of 15.21 yuan, with the length of the increase in the price will be higher, and in long-distance transmission, in order to ensure the quality of the signal, HDMI line may need to be paired with signal amplifiers and other equipment, which will also increase the overall cost.• Long distance wire: When longer cables are needed, VGA cables usually need to use better quality products and signal amplifiers due to signal attenuation problems, and the cost will increase. For example, the price of a 20-meter VGA cable may be more than 100 yuan, and the price of a 20-meter VGA3 + 9 cable from Habesis is 199 yuan. The price of the same length of HDMI cable is not low, but because the HDMI cable transmits digital signals, the signal stability in long-distance transmission is relatively good, if it is a reliable brand product, the price may be more than 200 yuan.In general, VGA cable and HDMI cable in the basic short length of the price difference is not large, but in the high-end, special needs and long distance cable, the price will be different due to material, brand, function and other factors.

VGA cables and HDMI cables have the following differences:Interface appearance• VGA interface: Usually a 15-pin D-type interface, shaped like a trapezoid, with three rows of pins, male and female heads are easy to distinguish, often used to connect computers, projectors, monitors and other devices.• HDMI interface: The appearance is relatively small, there are many types, such as standard HDMI interface, Mini HDMI interface and Micro HDMI interface. Standard HDMI interfaces are commonly used in TVS, computers, game consoles and other devices, while Mini HDMI and Micro HDMI interfaces are commonly used in some portable devices, such as cameras and tablets.Signal transmission• VGA cable: transmits analog signals, converts digital signals of computers or other devices into analog signals for transmission, and then converts analog signals back to digital signals at the receiving end for display.• HDMI cable: Transmission of digital signals, can directly transmit the device's digital signal to the display device, without the need for digital-to-analog conversion, reducing signal loss and interference, can provide clearer and more accurate image and audio signals.Resolution support• VGA cable: Theoretically supports up to 2048×1536 resolution, but in practical applications, 1920×1080 resolution is usually better supported, and signal quality problems may occur at higher resolutions.HDMI cable: Support higher resolution, such as HDMI 2.0 version support 4K resolution, HDMI 2.1 version support 8K resolution, to meet the needs of high-definition display devices.Audio transmission• VGA cable: can only transmit video signals, if you want to transmit audio, you need to connect an additional audio cable.• HDMI cable: not only can transmit video signals, but also can transmit multi-channel audio signals at the same time, which can achieve synchronous transmission of audio and video, simplifying the device connection.Application scenarioVGA cable: It is often used in scenes where the picture quality is not very high and the device only needs video output, such as old computers connected to projectors, monitors, etc.• HDMI cable: widely used in home theater, HDTV, computers, game consoles, Blu-ray players and other devices between the connection, can provide high-quality audio and video transmission, to meet the user's needs for high-definition picture quality and multi-channel audio.

VGA cable length has a great impact on transmission quality, mainly reflected in the following aspects:• Signal attenuation: VGA cables transmit analog signals, and the signal strength gradually decreases as the line length increases. This can result in lower brightness, lower color saturation, and poorer contrast in the image. For example, when the VGA cable is too long,the originally bright red may become dim, and the black part may also appear gray variegative, affecting the visual effect of the image.• Image distortion: During long-distance transmission, the waveform of the signal may be distorted, resulting in distorted images such as gaping, blurring or blurred edges. For example, when text is displayed, the edges of the text may become blurred and difficult to read; When a graph is displayed, the outline of the graph may appear jagged or irregular.• Increased interference: The longer the VGA cable, the more susceptible it is to external electromagnetic interference. The surrounding electrical equipment, power lines, etc., may produce electromagnetic waves, which will interfere with the signal in the VGA line, further reducingthe transmission quality. Interference may be manifested as horizontal stripes, snow spots or flickers on the image, and even affect the normal display of the image in serious cases.In general, when the VGA line is within 15 meters, the transmission quality is relatively good, which can basically ensure the clarity and color reproduction of the image. When the length is more than 15 meters, the signal attenuation and interference will bemore obvious, need to use a signal amplifier or higher quality VGA cable to minimize the impact. If the VGA cable length is more than 30 meters, even if the signal amplifier is used, the image quality may be greatly affected, and it may be necessary to consider using other interfaces or transmission methods that are more suitable for long-distance transmission, such as HDMI fiber optic cables.