lkpexperience.blogg.se - Best free pci tv capture card software

Video capture requires a quite large amount data mission, especially HD or ultra-HD video capture. PCI Express adopts point-to-point transmission, which could greatly decrease the costs of system development and manufacturing because the complexity and difficulty of the hardware platform design is loweredĭata transmission rate required by video capture and PCIe transmission rate.In contrast, if the user uses PCI cards, mounting one more card will cause the previous data transmission rate to drop.

In actual application, if the user uses PCIe cards, even though one more card is mounted, the previous data transmission rate will not decrease. In consequence, the data transmission rate will become lower with the increase of lanes. In comparison, PCI bus is a parallel bus and its total bandwidth is fixed.

As a serial bus, PCIe allows each lane to have its own exclusive bandwidth and thus lanes will not affect each other.

Compared with PCI bus, the single lane transmission rate of PCIe has been greatly increased.

The main reasons why PCIe can replace PCI are as follow: Besides video capture cards, PCIe interfaces have also been widely used in solid-state drives, network cards, graphics cards and audio cards. It was officially named PCI Express, and PCIe for short. By the end of 2001, more than 20 leading enterprises in the industry, including Intel, AMD, DELL and IBM, started drafting the specification for the new technology and finished it in 2002. Early in the spring of 2001, Intel had proposed to replace PCI bus with a new bus architecture technology and internal connection of multiple chips, which is known as 3G I/O.

PCI Express, officially abbreviated as PCIe, is the new generation of bus standard. As a result, except for some low-end cards or cards developed several years ago, most video capture cards in today’s market use PCIe slots. At present, motherboard manufacturers seldom provide PCI slot on motherboards and use PCIe instead. It was first used in servers and later on gradually applied to PCs. PCI was introduced by Intel in 1991 as the PCI Local Bus Standard and it became the standard bus afterwards. This article mainly introduces PCIe and its application in video capture cards. The USB interface is easier to use because its slot on the desktop and laptop is external, but the highest data transmission rate is lower than that of PCIe. For PCIe, each slot has dedicated bandwidth, so it is more suitable for multi-channel video capture.

The PCIe slot is located inside the chassis. There are two types of mainstream motherboard interface of video capture cards, PCIe and USB interface.

Motherboard interface of video capture cards