WXIA-TV in Atlanta has begun using a Snell & Wilcox MEMPHIS encoder to ingest uncompressed HD content and enable file-based storage and delivery of that content over its SD and HD broadcast channels.
The MEMPHIS encoder serves as a platform for real-time processing of HD-SDI. WXIA is feeding uncompressed HD signals into the MEMPHIS system, which creates an MPEG-2 signal and places it within an ASI transport stream. The ASI stream is then passed to an Omneon Spectrum, where the MPEG-2 material is demultiplexed and stored as a file-based asset. When material is required by a playout schedule, the HD clip is retrieved from storage and decompressed to create an uncompressed HD signal. This HD clip is simultaneously downconverted to provide an SD feed for playout. The SD signal broadcast by WXIA is devoted to NBC’s Weather Plus, and the primary program stream is output via an analog channel and a digital channel that offers HD wherever possible.
For more information, visit www.snellwilcox.com.