JP2809679B2 - Radio broadcast receiver - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a decoder for decoding traffic information received digitally encoded, for example traffic information transmitted according to the RDS system, as well as item data and A storage device for a section-specific feature, and an optical and / or storage device for traffic information as information read from the storage device.
Alternatively, the present invention relates to a radio broadcast receiver provided with an acoustic output device.

BACKGROUND ART West German Patent Application Publication No. 3536820 describes a traffic radio decoder which evaluates a digital signal extracted by demodulation of an auxiliary carrier radiated via a radio transmitter together with an FM radio broadcast program. . This auxiliary carrier does not interfere with normal radio broadcast programs,
A digital signal including traffic information can be transmitted without interrupting a broadcast radio program.

In the above-mentioned publications, it has already been proposed to create standardized texts and store them in a memory on the receiving side in accordance with the rules of formation that compose a traffic report accordingly. The reference texts can then be read out using digital signals and addressed acoustically or optically by addressing the storage location where they are stored.

A great deal of transmission capacity can be saved by standardized text storage for item data,
This is not the case with numerical data. Therefore, the item data, which additionally contains numerical values, are transmitted only as addresses of the storage area or storage location in which the numerical values are completely transmitted in the corresponding transmission code and other text data are stored. It was stipulated to transmit.

Digital transmission of traffic instructions can often radiate local or cross-regional traffic instructions through each transmitter in the transmitter network, as traffic instructions can often be transmitted repeatedly or very many times. is there.

Problems to be Solved by the Invention However, this causes a large number of traffic instructions at the peak of traffic, so that the repetition time becomes long so that updating is no longer guaranteed.

Further, the signal processing unit may decode and process the digital signal divided into a plurality of blocks in the transmission format of the digital signal accordingly.
It is messy.

The object of the invention is to provide a vehicle receiver according to the preamble of claim 1 in which the transmission capacity is increased and the relevant information can be transmitted in relevant data blocks or cycles as much as possible. Is to improve.

Means for Solving the Problems This object is achieved by a vehicle receiver according to the generic concept of claim 1 by a configuration described in a characteristic portion.

Operation and effect of the present invention The present invention is based on the recognition that the information value of numerical data has lower significance in traffic information. In any case, from these figures, the driver can only predict roughly. The reason is that the result is also influenced by other factors.

That is, the driver cannot immediately estimate from the exact length of the congestion how many minutes or when the driving time will be longer than when there is no obstacle. It is therefore justified to limit the accuracy to numerical data whose accuracy is almost in the most favorable case within the results that can be inferred from the identification of the numerical values.

Numerical data requires one to transmit a number between 1 and 1.000, even though it requires relatively little transmission capacity.
A zero digit unary data word is required. This transmission capacity can be further limited by assigning a numerical value to the same item data. This is because the normally available bandwidth of the numerical values actually listed is significantly smaller than the bandwidth that is available in the first place.

Item data having various numerical values can be stored in a fixed and predetermined stage of numerical values. This makes it possible to use perfectly accurate and numerical data in the item data, which significantly reduces the transmission capacity.

Embodiments Next, the present invention will be described in detail with reference to the accompanying drawings with reference to the illustrated embodiments.

The receiver of the vehicle shown in FIG. 1 comprises a receiver 32 having a speaker 34 and a decoder connected downstream of this receiver.
Has 10 Decoder 10 decodes the digital traffic information and transfers the address words generated at its output to storage devices 12 and 16. The storage device 12 is a memory for section-specific features such as place names, and the storage device 16
Item data, that is, item data not including a numerical value and item data including a numerical value are stored. The numerical values are then added directly to the item data, so that the item data and the numerical values are stored in a unique storage area that can be addressed via a unique address. Storage device 12
Stores the place names, and each place name is 1
Occur only once and occupy one of the 65536 storage areas. The storage of the place name additionally stores the number of the exit of the section, for example, the autobahn exit with the name of the place name.

By sending an address to read one of the areas stored in the storage device 12, one clear area indication is possible.

In order to determine section-specific features or item features, the logic coupling elements 20 and 28 are connected in a memory 26
Is used. Logical coupling elements 20 and 28 are in the line leading to optical output device 14. In this case, a demultiplexer 30 for distributing the information to the designated area of the output device is further connected to the logical connection element 28. On the other hand, the output side of the logical coupling element 20 communicates directly with the pointing area 22.

When traffic information, such as that displayed in clear text, is radiated to the optical output device 14, the address reaches the storage device 12. These addresses are, in order, instructions A, 7, Hannover, Hildesheim,
Acts on the output of the Hannover-Out and Anderten. The stored information is read from the storage device 16 by another address including the item data. In the storage device 16, item data and additional numerical values as necessary are stored in a storage area 18. At that time, the numerical values are fixedly stored at predetermined stages. This significantly limits the number of traffic information having the same text except for the numerical data.

In practice, six or seven different numbers are sufficient, wherein the numerical step size is preferably stepped logarithmically. This is because the staging in this method has been found to be effective in other physiological arts. What is dealt with here is an optical or acoustic sensation in which a substantial physical quantity is doubled or halved and a gradual change is perceived.

As a rule, it has been found to be advantageous to store the item data specified together with the numerical values without the value once. This means, for example, that very effective figures have to be used, while on the other hand the traffic information when the data on the figures is incomplete or missing, indicates to the driver the credibility of the traffic instructions. This can reduce trust and eliminate the need to add intentional numerical values.

In traffic information transmitted in clear text, the same information is still partially different. For this reason, when transferring item data directly to the storage device 16, on the one hand the enormous storage space is required and, on the other hand, the required length of the data words used for addressing is also extended. To ensure that the degree of traffic information variation that can occur does not go too far, by standardizing on the one hand and by taking into account only the statistically most frequently occurring traffic instructions on the other hand, The selection is made from the entire traffic instruction transmitted each time.

In the RDS system, the number of bits available for traffic information is limited. This is because the system is also supposed to transmit other information. Thus, 8 bits are available for section-specific features such as place names,
On the other hand, 8 bits are still allocated to the remaining item data. With 256 different addresses corresponding to these 8 bits, the same number of item data can be encoded. In this case, the quantity is, for example, 76 times without numerical value and no numerical data stored together with a fixed number.
Can be divided into 30 texts with notifications.

It is advantageous to assign the item data containing the numerical value or not including the numerical value to one case, since the transmitting device that encodes the traffic information does not have to construct various different item data. This eliminates obstacle factors that may lead to meaningless results when combining item data from various sources, for example. According to the present invention, both the address for the storage device 12 and the address for the storage device 16 can be called in one cycle. As a result, there is no problem that information distributed to a plurality of data cycles is temporarily stored and collected again.

FIG. 2 shows an excerpt from a part of the data stored in the item data or information register having 256 addressable storage areas. At a, the address at which the storage location can be detected and read out is shown. In b, item data is shown, while in c, numerical values are shown.

As can be seen from FIG. 2, the item data is repeated in different addressable storage areas. On the other hand, the assigned numerical value c is variously different.

If a selection is to be made in the traffic information to be indicated via the output device 14, for example a place name or expected item data is stored in the storage device 26 via the input device 24. Logical coupling elements 28 and 20 suppress the indication of traffic information until the traffic information accurately satisfies the selected feature.

This additional device for selecting section-specific features is very important in practice in order to prevent the driver from distracting from real traffic conditions due to the large amount of traffic information, so that The selection should additionally be evaluated as a simple operation. Such a selection of the item data is also made where the driver knows another area or section which he has first decided to travel in order to circumvent the obstacles occurring on the travel route.

[Brief description of the drawings]

FIG. 1 is a block diagram of a vehicular receiver according to the present invention, and FIG. 2 is a diagram showing a part of the storage contents of a storage device according to an embodiment of the present invention. 10 ... Decoder, 12, 16, 26 ... Storage device, 18 ... Storage area, 24 ... Input device, 14 ... Output device, 30 ... Demultiplexer, 32 ... Receiving unit, a ... Address, b: item data, c: numerical data.

Continuation of the front page (72) Inventor Klaus Maldus Bad Salzdate, Germany Furt Meisterberg 12 (58) Field surveyed (Int. Cl. ⁶ , DB name) H04B 1/16

Claims (7)

(57) [Claims] 1. A decoder (10) for decoding traffic information which is received in digital form and which is standardized according to the traffic report formation rules and which contains fault codes affecting vehicle traffic. At least one storage device (12,1) suitable for storing both item data (b) and section-specific features.
6), wherein each of the plurality of item data corresponds to a fault code affecting the vehicle traffic, and a fault code affecting the vehicle traffic connected to the output side of the decoder. Interpret and said at least one
Means (14) for retrieving the corresponding traffic information from the two storage devices (12, 16) and instructing the driver by at least one visual and audible indication, wherein the obstacle affecting the vehicle traffic is provided. Each of said item data (b) corresponding to a code, together with a numerical value (c) quantifying a distance parameter of the obstacle affecting said vehicle traffic, at a single respective address said at least one storage device ( 18. A radio broadcast receiver stored in (18), wherein compact transmission of a fault code affecting the vehicle traffic and quick retrieval of the item data are realized. 2. The radio broadcast receiving apparatus according to claim 1, wherein the item data (b) having various numerical values (c) is stored at a fixed stage of the numerical values. Machine. 3. The radio broadcast receiver according to claim 1, wherein the numerical value (c) is graded in a logarithmic step width. 4. The data according to claim 1, wherein the item data (b) having the numerical value (c) also stores the item data (b) having no value once. The wireless broadcast receiver according to claim 1. 5. The method according to claim 1, wherein the item data (b) and the numerical value (c) are selected and standardized at a statistical frequency from traffic information actually transmitted. The wireless broadcast receiver according to claim 1. 6. A section-specific feature having 28 different addressable storage areas such that the transmitted 32-bit address word contains a complete traffic indication consisting of local data and matter data. 28 addressable storage areas (18) for the item data (b) containing the place name of and including the numerical value (c) and not including the numerical value (c) (18)
The radio broadcast receiver according to any one of claims 1 to 5, wherein 256 items of data having the following are set. 7. An input device (24) for selecting item data (b) and a storage device (26) for storing the item data (b) are provided and store the item data. 2. An address input side and an output side of a storage device (16) are logically connected to said storage device (26) for selecting item data via a logical connection element (20). 7. The radio broadcast receiver according to any one of items 1 to 6.