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AssigneeHarman Becker Automotive Systems GmbH
InventorsAndreas Stiegler, Harald Schöpp, Frank Bähren
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The utilization of the capacity of a data transmission system (e.g., a MOST vehicle network) is improved in the event that the operating frequency and channel width of the system do not match the word frequency and word width of the digitized signal. The data words of the digitized signal are decomposed into partial words with a smaller width than that of the channels on which they are transmitted. Consequently, in each individual channel there remains a residual transmission capacity that makes it possible to transmit an identifier for each individual transmitted partial data word. A data sink, connected to the transmission system, uses this identifier to obtain information about the position of the respective partial data word in its original data word. This identifier may be one bit (i.e., a Boolean signal). Even if the number of partial data words into which each original data word is decomposed may be greater than two, a single bit is sufficient for example to distinguish every first or every last partial data word from all the other partial data words of a data word, and thus to deliver to the sink a fixed point from which it can begin to reconstruct the original data words.
A method for transmitting a signal digitized at a predetermined sampling frequency from a data source to a data sink in a data transmission system having a predetermined operating frequency and having at least one channel with a width of m bits, the digitized signal having an original data word width of n bits, where n is greater than m, the operating frequency being greater than the sampling frequency, the method comprising the steps of:
A data source for transmitting a digitized signal with a word width of n bits in a data transmission system, which has at least one channel with a width of m bits, where n is greater than, comprising logic circuit to decompose each data word into a plurality of partial words each with a width less than m bits and to add an identifier to at least one of the resulting partial words to identify the position of the partial data word, where the logic circuit shifts bits 2 to 8 of a 16-bit data word of the digitized signal by one bit to the right, and enters an identifier for each of the first and second partial words into the respective least significant bit of the two bytes of the resulting data word.
A data sink to reconstruct a digitized signal with a word width of n bits, by means of data transmitted on an m bit-wide channel of a data transmission system, such that n is greater than m, comprising a logic circuit to decompose each received data value into a partial word with a width less than m bits and an identifier, and to recombine the partial words to an original data word of the digitized signal by means of the identifier, where the logic circuit combines the two received data values with a width of m=8 bits to a 16-bit-wide data word, and shifts the least significant byte of the data word by one bit to the left.
A method of transmitting and receiving a digital data signal within a data transmission network having at least one channel, comprising the steps of:
Dependencies are inferred from the claim text.