Difference between revisions of "Dictionary"
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===[[Aspect Ratio]]=== | ===[[Aspect Ratio]]=== | ||
| − | The ratio of width to height of a video | + | The ratio of width to height of a video. |
===[[bitrate]]=== | ===[[bitrate]]=== | ||
The number of bits of data to be played per second. | The number of bits of data to be played per second. | ||
===[[Chroma]]=== | ===[[Chroma]]=== | ||
| + | Greek for color, the part of a video file or signal that encodes the color portion. | ||
===[[codec]]=== | ===[[codec]]=== | ||
| − | A part of the program which understands a type of video or audio. | + | A part of the program which understands a type of video or audio. ('''Co'''mpression/'''Dec'''ompression) |
===[[Decode]]=== | ===[[Decode]]=== | ||
To understand and play a file, VideoLAN needs to decode it. It does this with a decoder. | To understand and play a file, VideoLAN needs to decode it. It does this with a decoder. | ||
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===[[FourCC]]=== | ===[[FourCC]]=== | ||
===[[framerate]]=== | ===[[framerate]]=== | ||
| − | The number of frames of video displayed (or encoded to be displayed) per second. | + | The number of frames of video displayed (or encoded to be displayed) per unit time, usually expressed in frames per second (fps) or Hertz (Hz). One Hertz is equivilant to one frame per second. |
===[[IDCT]]=== | ===[[IDCT]]=== | ||
===[[Motion Compensation]]=== | ===[[Motion Compensation]]=== | ||
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===[[PTS]]=== | ===[[PTS]]=== | ||
===[[Sample rate]]=== | ===[[Sample rate]]=== | ||
| + | Usually used with audio, the frequency at which a signal is digitally sampled, usually expressed in Hertz (Hz) or kiloHertz (kHz). One Hertz is equivilant to one sample per second, One kiloHertz is a thousand (1000) Hertz. | ||
===[[Transcode]]=== | ===[[Transcode]]=== | ||
Transcoding is changing the format of a file. | Transcoding is changing the format of a file. | ||
Revision as of 08:26, 17 January 2006
Some terms used in the area of Audio/Video and there meaning.
Aspect Ratio
The ratio of width to height of a video.
bitrate
The number of bits of data to be played per second.
Chroma
Greek for color, the part of a video file or signal that encodes the color portion.
codec
A part of the program which understands a type of video or audio. (Compression/Decompression)
Decode
To understand and play a file, VideoLAN needs to decode it. It does this with a decoder.
Deinterlacing
Demuxing
Encode
TS
ES
An elementry stream, a single channel of audio, video or subtitles (without a container).
FourCC
framerate
The number of frames of video displayed (or encoded to be displayed) per unit time, usually expressed in frames per second (fps) or Hertz (Hz). One Hertz is equivilant to one frame per second.
IDCT
Motion Compensation
Muxing
Overlay
Displaying an image on top of the video
Packetizing
Post Processing
PCR
PS
PTS
Sample rate
Usually used with audio, the frequency at which a signal is digitally sampled, usually expressed in Hertz (Hz) or kiloHertz (kHz). One Hertz is equivilant to one sample per second, One kiloHertz is a thousand (1000) Hertz.
Transcode
Transcoding is changing the format of a file.
