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Bit Rate in Telecommunications and Computing
en.wikipedia.org/wiki/Bit_rateYapay zekadan makale özeti
- Basic Concepts
- Bit rate measures bits conveyed per unit of time in telecommunications
- Bit rate is expressed in bits per second (bit/s) with SI prefixes
- One byte per second (B/s) corresponds to 8 bit/s
- Data Communications
- Gross bitrate includes protocol overhead, net bitrate excludes it
- Net bitrate measures actual data transfer rate at reference point
- Error-correcting codes common in modern wireless systems
- Channel capacity is theoretical upper bound for maximum net bitrate
- Multimedia
- Bitrate depends on sampling frequency, bit depth, and encoding schemes
- Audio quality improves with increasing bitrate
- CD-DA uses 44,100 samples/second with 16-bit depth
- YouTube video quality ranges from 400 kbit/s to 1.4 Gbit/s
- Video and Audio Standards
- VCD quality uses MPEG1 compression at 1.15 Mbit/s
- DVD quality uses MPEG2 compression at 9.8 Mbit/s
- HDTV quality typically uses MPEG-4 AVC at 8-15 Mbit/s
- Blu-ray discs support up to 40 Mbit/s
- DCP uses JPEG 2000 compression at 250 Mbit/s