Method and device for insertion of asynchronous data in a digita

Details Method and device for insertion of asynchronous data in a digita Method and device for insertion of asynchronous data in a digita

1995-06-20

1999-10-19

Ton, Dang

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

H04J 312

Patent

active

059700718

ABSTRACT:
The disclosure concerns a procedure for insertion of samples representing digital data from a first source having a first bit rate in a digitized signal from a second source having a second bit rate, wherein the second bit rate is greater than the first bit rate, and each data of the first source is associated with at least one sample of a series of samples at the second bit rate, the samples being presented to a polyphase filter for which a set of coefficients is associated with a specific phase error previously introduced by said associations, the filtered samples being included in the digitized signal. The invention also includes a device that implements the above insertion procedure. The invention is applicable notably in the field of insertion of Teletext data into a digitized video signal.

REFERENCES:
patent: 5274372 (1993-12-01), Luthra et al.
patent: 5323391 (1994-06-01), Harrison

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