Hybrid analog/digital STB
AssigneeZenith Electronics Corporation
InventorsCaitlin B. Bestler, Khosro M. Rabii
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Abstract
A hybrid analog/digital STB includes a tuner supplying respective analog and digital television signal processing paths. The analog processing path provides demodulated composite analog video and audio signals and the digital processing path provides demodulated component digital video and audio signals. The demodulated analog and video signals are combined in composite or component form to achieve various desirable effects in a highly flexible system architecture. OSD and display map normalization functions are also integrated within the system architecture.
Claims12
Apparatus for processing analog and digital television signals received over respective television channels, comprising:
- a tuner (14) selectively operable for tuning said television channels;
- an analog processing path (24-28) coupled to the output of said tuner (14) and responsive to a tuned analog television signal for providing a demodulated baseband analog television signal including a first analog composite video signal and a first analog composite audio signal;
- a digital processing path (32-36, 40) coupled to the output of said tuner (14) and responsive to a tuned digital television signal for providing a demodulated digital television signal including a first digital component video signal and a first digital component audio signal;
- means (76, 80) for converting the first digital component video signal to a corresponding second analog composite video signal;
- and
- first means (82) for linearly mixing said first and second analog composite video signals in selected proportions for providing an output analog composite video signal.
Dependencies are inferred from the claim text.