Wireless microphone system and method of signal synchronization thereof

• US 8,311,549 B2
• Filed: 10/28/2009
• Issued: 11/13/2012
• Est. Priority Date: 10/30/2008
• Status: Expired due to Fees

• Current Assignee: Taiwan Gomet Technology Company Limited
• Original Assignee: Tawan Gomet Technology Company Limited
• Inventors: Chang, Sheng-Hsiung, Chang, Sheng-Yuan
• Primary Examiner(s): Nguyen, Tu X
• Application Number:
  US12/607,290
• Publication Number:
  US 20100113086A1
• Time in Patent Office: 1,112 Days
• Field of Search: 455/448, 455/450, 455/455, 455/464, 455/456.2
• US Class Current: 455/448
• CPC Class Codes: G07C 5/0891 Video recorder in combination with video camera

Abstract

The present invention discloses a wireless microphone system and a method of signal synchronization thereof, which comprises the following steps: receiving or transmitting a first channel wireless signal to at least one first wireless microphone through a first base station; receiving or transmitting a second channel wireless signal to at least one second wireless microphone through a second base station; and controlling a slave base station through a master base station, such that the first and the second channel wireless signals are synchronously received or transmitted. When any one of the base stations is not received a beacon for a duration of time, the base stations automatically switch to be the master base station and start to transmit the beacon. When other base stations receive the beacon, they switch back to be the slave base stations and use the received beacon as the basis of synchronization time correction.

Claims

1. A wireless microphone system, comprising:

a first base station receiving or transmitting a first channel wireless signal to at least one first wireless microphone by a first channel; and

a second base station receiving or transmitting a second channel wireless signal to at least one second wireless microphone by a second channel, and the first base station and the second base station are coupled by a wireless communication or a wired physical connection for transmitting or receiving a beacon;

wherein when no beacon is received within a predetermined period by the first base station and the second base station, the first base station or the second base station switches to be a master base station and the master base station transmits the beacon;

wherein when the beacon is received by the first base station and the second base station, the first base station and the second base station switch to be slave base stations, and the master base station controls the slave base stations in accordance with the beacon such the first channel wireless signal and the second channel wireless signal are synchronously received or synchronously transmitted.

2. The wireless microphone system according to claim 1, wherein when the first base station transmits the beacon, the first base station is the master base station, and the second base station and other base stations are the slave base stations.

3. The wireless microphone system according to claim 1, wherein the wired physical connection is mutually coupled by means of a synchronous signal line.

4. The wireless microphone system according to claim 1, wherein the first base station and the second base station respectively have a first ID and a second ID.

5. The wireless microphone system according to claim 4, wherein the first ID and the second ID are internal codes of the first base station and the second base station respectively or production serial numbers of the first base station and the second base station respectively.

6. The wireless microphone system according to claim 4, further comprising a calculation unit, the calculation unit calculates a first wait-time parameter or a second wait-time parameter respectively in accordance with the first ID or the second ID for the first base station or the second base station to wait before receiving the beacon.

7. The wireless microphone system according to claim 6, wherein when the first base station does not receive the beacon during a duration corresponding to the first wait-time parameter, the first base station switches to be the master base station and transmits the beacon to the second base station.

8. The wireless microphone system according to claim 6, wherein when the first base station receives the beacon during a duration corresponding to the first wait-time parameter, the first base station switches to be the slave base station and dose not transmit the beacon.

9. The wireless microphone system according to claim 6, wherein when the first wait-time parameter is equal to the second wait-time parameter and the startup time is identical, or the first wait-time parameter is not equal to the second wait-time parameter and the startup time is different, causing the first base station and the second base station transmit the beacon simultaneously, the first base station and the second base station both become the master base station at the same time.

10. The wireless microphone system according to claim 9, wherein when the first base station and the second base station transmit the beacon asynchronously due to errors in the system, the first base station or the second base station receives the beacon and the first base station or the second base station switches to be the slave base station.

11. A method of signal synchronization for a wireless microphone, comprising the following steps:

receiving or transmitting a first channel wireless signal to at least one first wireless microphone through a first base station by a first channel;

receiving or transmitting a second channel wireless signal to at least one second wireless microphone through a second base station by a second channel;

coupling the first base station and the second base station by a wireless communication or a wired physical connection for transmitting or receiving a beacon;

controlling a slave base station through a master base station, such that the first channel wireless signal and the second channel wireless signal are synchronously received or synchronously transmitted;

wherein when no beacon is received within a predetermined period by the first base station and the second base station, the first base station or the second base station switches to be the master base station, thus the master base station starts to transmit the beacon;

wherein when the beacon is received by the first base station and the second base station, the first base station and the second base station switch to be the slave base stations.

12. The method of signal synchronization for a wireless microphone according to claim 11, wherein when the first base station transmits the beacon, the first base station is the master base station and the second base station is the slave base station.

13. The method of signal synchronization for a wireless microphone according to claim 11, wherein the wired physical connection is mutually coupled by means of a synchronous signal line.

14. The method of signal synchronization for a wireless microphone according to claim 11, wherein the first base station and the second base station respectively has a first ID and a second ID.

15. The method of signal synchronization for a wireless microphone according to claim 14, wherein the first ID and the second ID are respectively the internal codes of the first base station and the second base station respectively or production serial number of the first base station and the second base station respectively.

16. The method of signal synchronization for a wireless microphone according to claim 14, further comprising a step of calculating a first wait-time parameter or a second wait-time parameter respectively in accordance with the first ID or the second ID for the first base station or the second base station to wait before receiving the beacon.

17. The method of signal synchronization for a wireless microphone according to claim 16, wherein when the first base station does not receive the beacon during a duration corresponding to the first wait-time parameter, the first base station switches to be the master base station and transmits the beacon to the second base station.

18. The method of signal synchronization for a wireless microphone according to claim 16, wherein when the first base station does receive the beacon during a duration corresponding to the first wait-time parameter, the first base station switches to be the slave base station and dose not transmit the beacon.

19. The method of signal synchronization for a wireless microphone according to claim 16, wherein when the first wait-time parameter is equal to the second wait-time parameter and the startup time is identical, or the first wait-time parameter is not equal to the second wait-time parameter and the startup time is different, causing the first base station and the second base station transmit the beacon simultaneously, the first base station and the second base station both become the master base station at the same time.

20. The method of signal synchronization for a wireless microphone according to claim 19, wherein when the first base station and the second base station transmit the beacon asynchronously due to errors in the system, the first base station or the second base station receives the beacon and the first base station or the second base station switches to be the slave base station.