DE102005039943A1 - Auxgate for direct feed and management of external audio sources in audio equipment or sound system used in motor vehicle, uses interface radio loudspeakers to generate improved audio sound while maintaining mark-specific work radio - Google Patents

Abstract

The Auxgate(RTM: an ideal multimedia expansion tool for car radio) uses the interface radio output loudspeakers for simultaneous generation of improved audio sound by means of the frequency response equalizers and power amplifiers in the sound system of a motor vehicle, while maintaining mark-specific work radio.

Description

1.) subject of the invention

The The invention relates to a technique (AUXGATE) for direct injection and management of external audio sources in any automotive audio equipment, especially "ex-factory" sound systems that by itself usually have no such additional inputs.

This happens by using the radio output stage / loudspeaker interface while creating the possibility of subsequent Influencing (improving) the audio sound by means of e.g. Frequency response equalizers or power amplifier in AUXGATE.

2.) Known techniques

• 2.1) Known techniques are auxiliary connections (Aux Inputs) on car radios and similar Head Units (H / U) to which portable music sources are connected, and It can thus feed into the vehicle sound system.

In most cases feature however, especially factory-integrated radios or H / U (VW, Opel, Ford, etc.) do not over this equipment and can also not retrofitted with it become. Thus, the vehicle owner these expansion options without complicated intervention in the factory H / U or replacement of the Factory H / U against a suitably equipped retrofit device not accessible.

Often The replacement with a retrofit device for various reasons is also not at all desired (Company cars, leasing or rental vehicles, etc.)

• 2.2) Known are also FM modulators, with whose help one external sources in an existing radio (quasi as "transmitter"), or adapter cassettes for feeding external signal sources in an existing compact cassette player. But these ways are always with a significant deterioration in the quality of the input audio signal connected because they always the signal indirectly, so in a roundabout way the cassette player or feed the FM tuner.

3.) Restrictions and problems of known techniques

Automobiles of recent years are for the most part no longer interchangeable radios or H / U, but are factory-fitted with integrated devices whose functional and operating elements are often distributed over dashboard, instrument panel, center console and steering wheel, so no coherent, DIN radio shaft form a compliant unit and thus resist replacement by (DIN format) retrofit equipment (see example in 1 ).

simultaneously But there is an increasing demand, external playback devices in the vehicle to be able to operate (Keyword "Multimedia"), for example the sound of a portable audio device (for example, an iPod, MP3 player), a DVD player, a mobile phone, a game console, a portable PC or the voice output of a portable GPS navigation device over the Play the speaker of the vehicle.

The Areas of application of the invention also extend to radios and H / U, which have such an AUX input. By AUXGATE can then there are also managed and fed additional source devices become.

4.) invention

The AUXGATE solves these problems in an innovative way:
In addition to the H / U, it also provides one to several audio inputs for playback devices and at the same time feeds them directly into the loudspeakers of the vehicle sound system without detours through other components, so that the sources can be monitored in the highest audio quality. Here he uses the available in all audio systems interface radio amplifier / speakers.

5.) Function description:

The Speakers are first disconnected from the H / U and the audio signal is sent to the speaker outputs of the H / U tapped, lowered to line level (0dBV). The H / U power amplifiers will be thus as a power amplifier except Power set and used only as a voltage amplifier. The won Signal is fed to a small signal mixer. At this point will be the external audio sources mixed. Finally, then the won Signal fed back to a subsequent power audio output stage, the now drives the speakers instead of the radio output stage.

Of the Connection takes place on the radio as well as on the original vehicle wiring harness by means of vehicle or manufacturer specific adapter plug and Electric wire.

Each H / U is extended in this way to the possibilities described above, without their functionality and integration into the vehicle interior to lose.

Of the Subject of the invention AUXGATE also forms an interface, around outside the H / U influences the audio sound by e.g. Equalizer, tone control or make processors, and in this way again the quality of the audio playback to improve.

at Using a high quality power amplifier can additionally the sound quality across from the amplifier stages integrated in the H / U be increased.

Claims (1)

A technique for direct feed and management of external audio sources in any audio-audio equipment, especially "ex-factory" sound systems, characterized in that the interface radio power amplifier / speakers while creating the possibility of subsequent influence (improvement) of the audio sound means eg frequency response equalizers or power amplifiers in the Auxgate, especially while maintaining the brand specific factory radio.