Vehicular radio receiver with standard traffic problem database
First Claim
1. A radio receiver having;
- a decoder (10) for decoding traffic announcements including traffic problem codes received in digital form,at least one memory device (12,
16) adapted to contain both a plurality of items of factual information (b) and route specific characteristics, wherein said items of factual information respectively correspond to said traffic problem codes,means (14), connected to an output of said decoder, for interpreting said traffic problem codes and retrieving corresponding traffic announcement information from said at least one memory device (12,
16) and indicating it to a vehicle operator by at least one of visual and acoustical indications,whereineach of said items of factual information (b) corresponding to the traffic problem code is stored, together with any numerical values (c) quantifying a distance parameter of the traffic problem, at a single respective address in said at least one memory device, thereby facilitating compact transmission of said traffic problem code and rapid retrieval of the hems of factual information; and
each of said items of factual information (b) provided with the distance parameter numerical values (c) is also identically stored again in said at least one memory device without the numerical values.
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Accused Products
Abstract
A vehicular radio receiver with an RDS (Radio Data System) decoder for decoding digitally coded traffic announcements is improved by using short codes for common traffic problems in order to minimize the required transmission capacity. The receiver includes a database with, for example, 256 fields, each containing a short traffic problem description.
Transmission of the actual numerical values for the length of a traffic problem or for visibility in fog is dispensed with. Instead, defined standardized numerical information is stored in the same memory field as the short description of the traffic problem so that they can be retrieved together. Furthermore, a pre-determined staggering of the numerical values is provided so that the memory capacity, and the transmission capacity, does not increase unnecessarily.
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Citations
6 Claims
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1. A radio receiver having;
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a decoder (10) for decoding traffic announcements including traffic problem codes received in digital form, at least one memory device (12,
16) adapted to contain both a plurality of items of factual information (b) and route specific characteristics, wherein said items of factual information respectively correspond to said traffic problem codes,means (14), connected to an output of said decoder, for interpreting said traffic problem codes and retrieving corresponding traffic announcement information from said at least one memory device (12,
16) and indicating it to a vehicle operator by at least one of visual and acoustical indications,wherein each of said items of factual information (b) corresponding to the traffic problem code is stored, together with any numerical values (c) quantifying a distance parameter of the traffic problem, at a single respective address in said at least one memory device, thereby facilitating compact transmission of said traffic problem code and rapid retrieval of the hems of factual information; and each of said items of factual information (b) provided with the distance parameter numerical values (c) is also identically stored again in said at least one memory device without the numerical values. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification