Buffalo Technology PC-P1LAN Manual De Usuario

21

Mini LinkTheater User’s Manual 

Digital file format developed for Windows 

by Microsoft. If a video is recorded in AVI 

format (without using codec), the recorded 

file size becomes larger because video 

compression is not used (if recorded at 

320 x 240 resolution, 30 minutes of video 

requires about 5GB of space).  Advantages 

are that files can be processed simply using 

editing software, but video and audio timing 

may become out of sync if recorded for a 

long period of time. 

Videos are usualy recorded at the same 

bitrate (amount of data). For this reason, 

there may be reduced image quality if 

you compare scenes that have a lot of 

movement with those that have little 

movement. Furthermore, block noise may 

also occur in scenes that contain intense 

movement because of the lack of bitrate. 

The bitrate is changed automatically to 

keep image quality constant.  As the bitrate 

changes according to the video, the size 

of the recorded files will differ greatly 

depending on the video being recorded 

(videos with lots of movement are larger). 

This mode records within a bitrate range 

(data size) set prior to recording. Recording 

is performed with a higher bitrate when there 

is a lot of movement, and a lower bitrate 

when there is only a little movement. On 

LinkTheater, you can specify the (average) 

bitrate and maximum bitrate, and record 

using the (average) bitrate value as the 

average value. 

International standard of animation 

compression defined by the Moving Picture 

Expert Group (commonly known as MPEG 

format forum). MPEG format adopts a 

method that compresses the video and 

audio data separately, and is the format 

used on DVD-Video and Video-CD. There 

are a number of formats within MPEG 

format, such as [MPEG-1] or [MPEG-2]. 

Like MPEG-1, but much better.  This is the 

format used for DVD-Video. 

WMV is Microsoft's Windows Media Video 

format. 

Codec is the collective name for coding 

and decoding. A codec is a program that 

compresses/decompresses video and audio, 

and is required for playing/saving video on a 

computer. There are many types of codecs, 

and different codecs are required for different 

video files. If there are no codecs that suit a 

particular file on the computer, the video may 

not be displayed, or the audio may not be 

outputted. 

Rate of data flow for a video file. Higher 

bitrates give better quality video, but increase 

network traffic and file size.