Method of adding data to a data communication link while...

Details Method of adding data to a data communication link while... Method of adding data to a data communication link while...

2005-06-28

2005-06-28

Kostak, Victor R. (Department: 2614)

Television

Nonpictorial data packet in television format

Audio

C348S467000, C348S484000

Reexamination Certificate

active

06912008

ABSTRACT:
A method of adding auxiliary data, e.g., audio data, to a high-speed serial video link in such a way that it is invisible to existing receiver and such that auxiliary data, e.g., audio, can be transmitted without any knowledge of the capabilities of the display to receive the auxiliary data. Some of the DC balancing bits are used to transport the auxiliary data information over the link in a manner that does not change the data recovered by a DVI-CE receiver, or a legacy receiver (installed base). DC balancing is also maintained, but with differences over known techniques. Since the auxiliary data bits (which are occupying the time slots of the DC balance bits) will be interpreted by legacy receivers as DC balance bits, the data must be optionally inverted to remain consistent with the value of the auxiliary data bit being transmitted. The DC balance bit that is transmitted at the beginning of each group of four words must also invert the value of the auxiliary data to allow the DC balancing to be achieved independent of the auxiliary data.

REFERENCES:
patent: 4583074 (1986-04-01), Okamoto et al.
patent: 5491479 (1996-02-01), Wilkinson
patent: 5633632 (1997-05-01), Ido et al.
patent: 6268847 (2001-07-01), Glen
patent: 6633243 (2003-10-01), Mair et al.
patent: 2003/0016305 (2003-01-01), Champion et al.

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