Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2011-01-11
2011-01-11
Ferris, Derrick W (Department: 2463)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
Reexamination Certificate
active
07869466
ABSTRACT:
The invention relates to the technical field of data transmission via a transmission link according to the TDM method, corresponding to time division multiplex. Such a method is used in an audio mixing console in order to transport the sample words of a plurality of audio channels jointly to an audio DSP processor and, after processing, to transmit them back from said processor to an output processor. Since the data output process is performed in an automated manner with the aid of a DMA unit, severe interfering noise can occur in cases of error, said noise also being output via the loudspeakers. The invention is based on the aim of avoiding such interfering effects. An error detection method based on the marking of data frames is used for this. For this purpose, a number of marking bits of the time slot of the data frame are set, the bit pattern of the marking bits being alternated in a defined sequence. Upon error detection, the outputting of the data via the loudspeakers is prevented, such that no interfering noise arises.
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Search Report Dated Sep. 6, 2007.
Gries Ulrich
Schreiber Ulrich
Steinborn Peter
Anwar Mohammad
Ferris Derrick W
Navon Jeffrey M.
Shedd Robert D.
Thomson Licensing
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