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Posted by seoservice1 on August 3rd, 2022

S-video, standing for Separate Video, transmits video signals over a cable by dividing into two separate signals: one for color and another for brightness. Due to this separation, sharper and higher quality images than composite video can be achieved. S-video does not carry audio, so it commonly run with red and white RCA audio cables.

Component video KickAss Torrents

This video interface is superior over both composite and S-video. Because its three cables better preserve the various elements of the video signal including brightness and color, resulting in enhanced picture quality. Component video uses three RCA connections, Red, Blue and Green to send video signals. It carries visual data only, meaning that audio cables are still required. Hence, it is usually paired with stereo (red and white) RCA audio connections.

VGA

VGA or Video Graphics Array is the most popular video connection between computers and monitors. It is used on computer video cards, projectors and set top boxes. A standard VGA connection has 15 pins and supports display resolution of 640*480 pixels, while enhanced version SVGA is allowed for resolution of 1024*768. It is worth mentioning that the maximum resolution is limited by the connector bandwidth and cable quality and length.

In the VGA connector, due to tiny little pins into a small connector, building small coaxial cables is hard.

Digital display interfaces

DVI

Digital Video Interface (DVI) has been designed as a replacement for VGA (analog interface). However, in some cases DVI still supports analog displays. In fact, DVI is the only standard which can carry both analog and digital signals on one interface. If the display is analog, the DVI connection will convert the digital signal to an analog signal, otherwise no conversion will be necessary. It is worth mentioning that, the analog video bandwidth of DVI is higher than VGA, thus higher resolution can be supported compared to VGA. So, it can be applied by high resolution displays such as UXGA and HDTV.

DVI cables or ports with fewer pins are designed for lower resolution devices. In order to support maximum resolution, the DVI port should contain all the pins. Since DVI does not support High-bandwidth Digital Content Protection (HDCP) encryption by default, by using hardware which only includes DVI ports, the video protection is not guaranteed. This is the biggest drawback of DVI. Since HDCP protects video from illegal copying, this feature is very critical for video surveillance systems.

Without any form of compression in video streaming, the network can't transmit the raw data. Also, due to large file sizes, storing data on limited capacity of disk drives is not possible. That's why we need to use compression, especially in video surveillance systems. Video compression removes redundant video data, so that the video file can be transmitted or stored effectively. Video content is encoded and decoded by using a video codec method, inside a container format, so the video quality is not degraded at the time of transferring over the network. We study the concept and some different types of video codecs and video containers along with their differences.

What is video codec?

A codec is a software used to compress or decompress a digital media file for transmission over a data network. In fact, a pair of encoding and decoding algorithms that work together is called a video codec, so that encoder uses these algorithms to effectively compress the size of the video file, and then decoder decompress it when needed. Some codecs include both of these components and others include one of them. Moreover, codecs are divided into two categories: lossless and lossy codec. In lossless codec all the information is kept in the original stream, thus the video quality is preserved. On the other hand, in lossy codec due to using lower data bandwidth and missing some of the original data to achieve the best compression, the quality will be reduced.

There are different standards of codec which use different technologies to encode and decode the video file related to intended application. Since video content that is compressed using one standard cannot be decompressed with other standard, different implementation of video codecs are normally not compatible with each other. Because, one algorithm cannot correctly decode the output from another algorithm.