Wireless digital music playing and transmitting device for portable DVD/CD player

• US 20050249484A1
• Filed: 05/10/2005
• Published: 11/10/2005
• Est. Priority Date: 05/10/2004
• Status: Abandoned Application

• Current Assignee: Easen Digital Technology Co., Ltd.
• Original Assignee: Easen Digital Technology Co., Ltd.
• Inventors: Wang, Ming Xin, Ng, Man Dor, Cao, Ya Bin
• Application Number:
  US11/125,070
• Publication Number:
  US 20050249484A1
• Time in Patent Office: Days
• US Class Current: 386/231
• CPC Class Codes: H04N 21/2143 located in a single building, e.g. hotel, hospital or museum arrangements specially adapted for plural spots in a confined site in broadcast systems H04H20/63; adaptations for transmission by electric cable for domestic distribution in television systems H04N7/106
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/8113 comprising music, e.g. song in MP3 format
• CPC Class Codes: H04R 5/00 Stereophonic arrangements stereophonic pick-ups H04R9/16, H04R11/12, H04R17/08, H04R19/10

Abstract

A wireless digital music playing and transmitting device installed on the portable DVD/CD player wherein a transmitter having a functional interface consists of a central processing and audio frequency AD converting circuit, a radio-frequency module, an indicating lamp and a power control circuit; output terminals of the central processing and audio frequency AD converting circuit are connected to the radio frequency module, the indicating lamp and the power control circuit; a receiver consists of at least one set of switching circuits, a radio-frequency receiving module, a central processing and AD converting circuit and an audio-frequency amplifier circuit; output terminals of said radio-frequency receiving module are connected to the central processing and AD converting circuit, output terminals of the central processing and AD converting circuit are connected to the audio-frequency amplifier circuit which is provided with a functional interface.

Claims

1. A wireless digital music playing and transmitting device for portable DVD/CD player, characterized in that a transmitter consists of a central processing and audio frequency AD converting circuit, a radio-frequency module, an indicating lamp and a power control circuit;

output terminals of the central processing and audio frequency AD converting circuit are connected to the radio-frequency module, the indicating lamp and the power control circuit;

the transmitter is provided with a functional interface which is capable of connecting a DVD/CD player or a microphone;

a receiver consists of at least one set of switching circuits, a radio-frequency receiving module, a central processing and AD converting circuit and an audio-frequency amplifier circuit;

output terminals of said radio-frequency receiving module are connected to the central processing and AD converting circuit, output terminals of the central processing and AD converting circuit are connected to the audio-frequency amplifier circuit, and the audio-frequency amplifier circuit is provided with a functional interface connecting to a loudspeaker.

2. The wireless digital music playing and transmitting device for portable DVD/CD player according to claim 1, characterized in that said device is also provided with a remote controller for controlling the receiver at non-mobile situation.

3. The wireless digital music playing and transmitting device for portable DVD/CD player according to claim 1, characterized in that the central processing and AD conversing circuit 0 comprises digital signal processor U1, audio frequency AD converter U2, first clock circuit X1 and second clock circuit X2;

the audio frequency AD converter U2 is AK4550, an operating clock thereof, including a master clock MCLK and an input/output channel clock LRCK, is provided by the digital signal processor U1;

the digital signal processor U1 is an interface IC implementing the connection of the audio frequency AD converter U2 with the radio frequency transmitting circuit 1, via the interface IC the audio frequency information is transmitted to the radio frequency module M1 of radio frequency transmitting circuit 1 and the control signal back from the receiver is received.

4. The wireless digital music playing and transmitting device for portable DVD/CD player according to claim 2, characterized in that the central processing and AD conversing circuit 0 comprises digital signal processor U1, audio frequency AD converter U2, first clock circuit X1 and second clock circuit X2;

the audio frequency AD converter U2 is AK4550, an operating clock thereof, including a master clock MCLK and an input/output channel clock LRCK, is provided by the digital signal processor U1;

the digital signal processor U1 is an interface IC implementing the connection of the audio frequency AD converter U2 with the radio frequency transmitting circuit 1, via the interface IC the audio frequency information is transmitted to the radio frequency module M1 of radio frequency transmitting circuit 1 and the control signal back from the receiver is received.