CEA-775-C defines mechanisms to allow a source of MPEG service,
such as a cable or terrestrial set-top box, digital VCR, or DTV to
utilize the MPEG decoding and display capabilities in a DTV. A
method is included to allow the OSD Producer to supply bitmap
graphic overlays for blending and composition in the DTV over
decoded video.
CEA-775-C supports an optional baseband analog audio/video
connection between an audio/video source device and the DTV.
Mechanisms are provided to allow the source device to control the
selection of the audio/video source for display in the DTV between
an MPEG service decoded in the DTV and incoming analog audio/video
supplied to it via an external input.
Nothing in CEA-775-C is intended to constrain the use of other
1394-based protocols.
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