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The VoIp Solution Workbook is a comprehensive guide to terms and definitions that
are commonly used in reference to understanding VoIP Solutions.
are commonly used in reference to understanding VoIP Solutions.
| Codec |
A codec is a device or program capable of performing encoding and decoding
on a digital data stream or signal. The word codec may be a combination of any
of the following: 'Compressor-Decompressor', 'Coder-Decoder', or
'Compression/Decompression algorithm'.
An endec is a similar (but different) concept for hardware. In the mid 20th
century, a "codec" was hardware that coded analogue signals into Pulse-code
modulation (PCM) and decoded them back. Late in the century the name came
to be applied to a class of software for converting among digital signal formats,
and including compander functions.
Codecs (in the modern, software sense) encode a stream or signal for
transmission, storage or encryption and decode it for viewing or editing. Codecs
are often used in videoconferencing and streaming media applications. A video
camera's analogue-to-digital converter (ADC) converts its analogue signals into
digital signals, which are then passed through a video compressor for digital
transmission or storage. A receiving device then runs the signal through a video
decompressor, then a digital-to-analogue converter (DAC) for analogue display.
A "codec" is a generic name for a video conferencing unit.
An audio compressor converts analogue audio signals into digital signals for
transmission or storage. A receiving device then converts the digital signals
back to analogue using an audio decompressor, for playback.
The raw encoded form of audio and video data is often called essence, to
distinguish it from the metadata information that together make up the
information content of the stream and any "wrapper" data that is then added to
aid access to or improve the robustness of the stream.
Attributes and Credits
The information and facts supplied on this subject
derive from http://en.wikipedia.org/wiki/Main_Page
on a digital data stream or signal. The word codec may be a combination of any
of the following: 'Compressor-Decompressor', 'Coder-Decoder', or
'Compression/Decompression algorithm'.
An endec is a similar (but different) concept for hardware. In the mid 20th
century, a "codec" was hardware that coded analogue signals into Pulse-code
modulation (PCM) and decoded them back. Late in the century the name came
to be applied to a class of software for converting among digital signal formats,
and including compander functions.
Codecs (in the modern, software sense) encode a stream or signal for
transmission, storage or encryption and decode it for viewing or editing. Codecs
are often used in videoconferencing and streaming media applications. A video
camera's analogue-to-digital converter (ADC) converts its analogue signals into
digital signals, which are then passed through a video compressor for digital
transmission or storage. A receiving device then runs the signal through a video
decompressor, then a digital-to-analogue converter (DAC) for analogue display.
A "codec" is a generic name for a video conferencing unit.
An audio compressor converts analogue audio signals into digital signals for
transmission or storage. A receiving device then converts the digital signals
back to analogue using an audio decompressor, for playback.
The raw encoded form of audio and video data is often called essence, to
distinguish it from the metadata information that together make up the
information content of the stream and any "wrapper" data that is then added to
aid access to or improve the robustness of the stream.
Attributes and Credits
The information and facts supplied on this subject
derive from http://en.wikipedia.org/wiki/Main_Page