General term of the extended card which is installed in the PCI slot. Most extended cards which exclude the video card are the PCI card. Because of this, the expression, PCI card excessively is not used, usually like “network card” “SCSI card” “sound card” and so on, paying attention to the function of the extended card, calls and divides. By the way, as for the video card the type which is installed in the AGP slot which even the subspecies of PCI can be said has become main current.

PCI slot <PCI slot>

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Field:
Personal computer > bus > PCI slot

The bus which ties between each part inside the personal computer (the channel) standard. It was decided PCI SIG which centers the Intel corporation (Special Interest Group) by. For a long time, it spreads quickly as the standard which is substituted to the ISA bus which is de facto standard presently is adopted for most personal computers. As for first PCI standard, bus width (the data quantity which can be sent with the transfer of 1 times) at 32 bits operational frequency (frequency of transfer per 1 seconds) 33MHz. Maximum data rate was 133MB/s. With up-to-date standard 64 bits in bus width, the high speed of maximum 533MB/s also specification is stipulated with 66MHz operation. In addition, there is also a standard, PCI-X which expands PCI in for the serve

The jack which is on the motherboard, installs the PCI card.

Most extended cards which exclude the video card are designed installing in the PCI slot, in order to use. As for the video card the system which is installed in the private AGP slot which even subspecies of PCI slot can be said has become main current.

As for the PCI slot being the PCI card and something which connects the motherboard electrically, in the PCI slot itself as for processing it is not done, exchange of the actual data is entrusted to the motherboard and the PCI card. 5 these PCI slots are prepared in the motherboard of ATX size.

PCM

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Full spelling: Pulse Code Modulation
Field:
Multimedia > sound/music > PCM
Expression of information > file format > PCM

One of the systems which convert the analog signal of sound and the like to the digital data. Sampling (sampling) it does the signal in every fixed time, quantizing in integer value of the bit number which is decided it records. Quality of the digital data which is recorded is decided, no time it digitalizes in 1 seconds, (sampling frequency) with, it expresses the data at numerical value of several bits, (quantization bit number) with. Music CD (CD-DA) we utilize PCM system, sampling frequency 44.1kHz (in 1 seconds the digitalization of 44100 times), the quantization 16 bit (the voice data expression) are at 65536 stages 0 - 65535.

PCN

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Full spelling: PointCast Network
Field:
Internet > PCN