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Method and device for low-power fm transmission of audio data to rds capable fm radio receiver

A radio receiver and radio transmission technology, applied in the direction of radio data system/radio broadcast data system, rebroadcast broadcast device between terminal equipment, transmission system, etc., can solve the problem of reducing signal quality, etc.

Active Publication Date: 2008-03-12
WSOU INVESTMENTS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, as mentioned above, this situation is usually prohibited and should not happen, on the other hand, since the transmission power of private transmitters is much lower than that of licensed transmitters, such interference will also be very serious Reduce the quality of the signal received from the music player

Method used

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  • Method and device for low-power fm transmission of audio data to rds capable fm radio receiver
  • Method and device for low-power fm transmission of audio data to rds capable fm radio receiver
  • Method and device for low-power fm transmission of audio data to rds capable fm radio receiver

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Embodiment Construction

[0133]Figure 1 shows the steps of an example embodiment of the method according to the invention. At step 102, various frequency ranges (eg, 88-108 MHz FM radio) are scanned to detect available frequencies. In particular, "available" is to be understood as meaning frequencies that are not used for licensed broadcasts (eg radio station programs) that should not be interfered with according to the FCC. However, frequencies on which other signals that may cause interference, such as other unauthorized transmissions or interfering signals, are received may also be excluded. Such frequencies should be excluded as they may not be suitable for audio transmission. In one embodiment of the invention, the program identification code (PI) of the RDS system is evaluated to determine whether the signal received on the scanned frequency is a licensed broadcast. If such a PI code is received, it can be verified that the sender is associated with a licensed legal broadcast.

[0134] Then, ...

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PUM

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Abstract

A method for radio transmission of audio data from an audio player device for receipt by an RDS capable FM radio receiver, comprising scanning an FM frequency range to detect available radio frequencies on which no broadcast transmissions or interfering signals are currently received; storing detected available frequencies; selecting one of the stored frequencies; receiving audio data from the player; modulating received audio data with FM; and transmitting modulated audio data on the selected frequency. A corresponding electronic device comprises a receiver for scanning an FM frequency range to detect the above-mentioned type of available radio frequencies; a memory device for storing same; a controller for selecting one of the stored frequencies; an audio input interface for receiving audio data from the player; and a transmitter for modulating received audio data with FM and transmitting modulated audio data on a frequency selected by the controller.

Description

technical field [0001] The present invention relates to a method and apparatus for transmitting audio data from an audio playback device to an RDS capable FM radio receiver. In particular, it relates to the transmission of audio data from a mobile playback device to an RDS-capable car radio system. Background technique [0002] Mobile electronic devices capable of music playback are becoming increasingly popular, among which Apple(R) Computer Inc.'s IPOD TM is one of the most prominent examples. These music players are mainly intended to be used in combination with a headset or earphones. This is of course the most preferred way of listening for the typical mobile use of such a device. However, these players have become quite sophisticated recently, and many of them even include hard drives capable of storing gigabytes of music. Therefore, it is only reasonable that a user might want to also use his player as a source of music data in other contexts, and also for playing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H1/00H04H20/62
CPCH04H20/62H04B1/034H04H60/41H04H2201/13H04H20/08Y02D30/70
Inventor K·梅森
Owner WSOU INVESTMENTS LLC
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