Glossary of terms
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This is a table of commonly used phrases by the ATV community.
| Term / TLA | Definition | comment | Link |
|---|---|---|---|
| QPSK | Quadrature Phase Shift Keying | Commonly used digital modulation | https://en.wikipedia.org/wiki/Phase-shift_keying |
| Bit rate | Number of bits per second of data - used in DATV to describe the video and audio bit rate before modulation | https://en.wikipedia.org/wiki/Bit_rate | |
| Symbol rate | Used in DATV to describe the actual modulation rate after FEC | https://en.wikipedia.org/wiki/Symbol_rate | |
| FEC | Forward Error Correction | Digital error correction applied before modulation which repeats some of the information - hence Video Bit Rate is always less than the transmitted Symbol rate | http://abelian.org/fec/pn161218/ |