Digital traffic news evaluation method
First Claim
1. A method for evaluating traffic announcements received in digitally encoded form in a data packet forming part of a broadcast radio signal a complete cycle of reports and data being repeated periodically,comprising the steps ofdecoding said data packet from said broadcast signal;
- evaluating said data packet to generate elements of traffic announcements;
storing said traffic announcements in a memory (14);
said evaluating step including identification and storage of a variable-value check number, contained in a predesignated portion of said data packet, which indicates a total number of reports which are being broadcast during a current cycle of data, and maintenance of a running count of reports actually received in said cycle;
and comparing, at an end of each cycle, said stored variable-value check number with said running count of reports actually received,thereby permitting checking, of traffic announcement data received, for omissions due to poor transmission conditions.
1 Assignment
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Accused Products
Abstract
In a method for evaluating traffic announcements received in digitally encoded form in a data packet, the data packet is decoded, and after the evaluation the traffic announcements are stored in memory. Under poor broadcasting conditions, it may be uncertain whether all the traffic announcements transmitted have actually been correctly received and evaluated. For confirmation of completeness, data words that, in encoded form, include the nominal number of reports transmitted in one cycle are broadcast within each complete cycle of traffic announcements. The decoded and evaluated reports counted within one cycle are compared with this nominal number.
27 Citations
13 Claims
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1. A method for evaluating traffic announcements received in digitally encoded form in a data packet forming part of a broadcast radio signal a complete cycle of reports and data being repeated periodically,
comprising the steps of decoding said data packet from said broadcast signal; -
evaluating said data packet to generate elements of traffic announcements; storing said traffic announcements in a memory (14); said evaluating step including identification and storage of a variable-value check number, contained in a predesignated portion of said data packet, which indicates a total number of reports which are being broadcast during a current cycle of data, and maintenance of a running count of reports actually received in said cycle; and comparing, at an end of each cycle, said stored variable-value check number with said running count of reports actually received, thereby permitting checking, of traffic announcement data received, for omissions due to poor transmission conditions. - View Dependent Claims (2)
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3. A method for evaluating traffic announcements received in digitally encoded form in a data packet forming part of a broadcast radio signal, a complete cycle of reports and data being repeated periodically,
comprising the steps of decoding said data packet from said broadcast signal; -
evaluating said data packet to generate elements of traffic announcements; storing said traffic announcements in a memory (14); said evaluating step including identification of a check number, contained in a predesignated portion of said data packet, which indicates a total number of reports which are being broadcast during a current cycle of data, and maintenance of a running count of reports actually received in said cycle; and comparing, at an end of each cycle, said stored check number with said running count of reports actually received, thereby permitting checking, of traffic announcement data received, for omissions due to poor transmission conditions; and
whereinsaid predesignated portion of said data packet contains not only said check number but also indications as to the length of respective ones of said reports. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A vehicle radio receiver having a decoder (18) decoding traffic announcements received in digitally encoded form, having
a computer (12), having an input connected to an output of said decoder (18), for evaluating a received data packet and a memory (14), bidirectionally coupled to said computer (12), for storing the traffic announcements, wherein the computer (12) includes a program memory (16) having a control program, by means of which said computer is controlled in such a way that data words within each complete cycle of traffic announcements, which in encoded form include a variable-value nominal number of reports broadcast in the current cycle, are decoded and evaluated, and that the reports decoded and evaluated within this same cycle are counted and compared with the nominal number.
Specification