EP0507096A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A RDS receiver

Assignee: Pioneer Corp

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Filing: 1992-03-05

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Granted: —

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Expires: 2012-03-05

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Abstract

Abstract The present invention provides an RDS receiver for use with an automobile which receives data concerning radio broadcasting stations incorporated within a network and is capable of, in case the electric field strength of a radio station currently being received has decreased to less than a predetermined level in some way or other, automatically selecting a radio wave broadcast from another radio station having a higher electric field strength in the same network, wherein the RDS receiver, in automatically changing from a radio station currently being received to another radio station broadcasting the same program, extends or shortens a muting time during which the muting operation is executed, by controlling a station detector (SD) waiting time, which is a required period of time until the SD signal becomes high level, in proportion to a difference between the frequency currently being received and that of another radio station. In order to complete the above object, the RDS receiver according to the present invention comprises a controlling means to calculate a difference between the frequency currently being received and that of another radio station, and controls an SD (station detector) waiting time in proportion to the thus figured-out difference therebetween.

Inventors

👤 Shoji c/o Pioneer Electronic Cor. Suenaga
👤 Takashi c/o Pioneer Electronic Cor. Miyake

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-27 09:10

CPC Classifications

H; H04; H04H; H04H20/00; H04H20/20; H04H20/22; H04H20/26; H04H2201/00; H04H2201/10; H04H2201/13; H04H40/00; H04H40/18

Claims Analysis

Total Claims: 3

Claim 1

Independent Claim 218 words

An RDS receiver which receives data multiplexed on a broadcast wave concerning radio stations incorporated in a network and is capable of, in case the electric field strength of a radio station currently being received has decreased to less than a predetermined level, automatically selecting a radio wave broadcast from another radio station having a higher electric field strength in said same network so as to switch said radio station currently being received to the thus selected another radio station, said RDS receiver comprising; means for sampling RDS data including frequencies of radio stations incorporated in a network; storing means for storing said sampled frequencies; level detection means for detecting a phenomenon that the electric field strength of a radio station currently being received has decreased to a level which is less than a predetermined level; controlling means for receiving a detection signal outputted from said level detection means, selecting a frequency of another radio station broadcasting the same program as the station currently being received from said sampled frequencies previously stored in said storing means, calculating a difference between the frequency of said radio station currently being received and said selected frequency, and sending an instruction signal to a muting circuit for muting an audio signal for a certain period in proportion to the thus calculated difference.

Claim 2

Independent Claim 140 words

A method of controlling a period of time during which an audio signal muting operation is executed in an RDS receiver which is capable of receiving data multiplexed on a broadcast wave concerning radio stations incorporated in a network, said method comprising the steps of: extracting data concerning radio stations incorporated in a network; storing frequencies of said extracted data in a storing means; detecting a phenomenon that the electric field strength of a radio station currently being received has decreased to a level less than a predetermined level; selecting a frequency from said frequencies of said extracted data; calculating a difference between the frequency of the radio station currently being received and said selected frequency; and sending an instruction signal to a circuit for muting an audio signal for a certain period in proportion to the thus calculated difference.

Claim 3

Dependent Claim 89 words

A method of controlling a period of time during which an audio signal muting operation is executed in an RDS receiver as defined in claim 2, wherein said calculating step is processed on the basis of a formula; (ms) = 8(ms) + 8 x Δf(MHz)/108.0 - 87.5(MHz), where ms stands for a millisecond and the first ms represents an station detector waiting time be waited before releasing said muted period, and Δf represents a difference between said frequency of the radio station currently being received and said selected frequency.

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