EP 1135969 B1 20040331 - DIGITAL WIRELESS LOUDSPEAKER SYSTEM
Title (en)
DIGITAL WIRELESS LOUDSPEAKER SYSTEM
Title (de)
DRAHTLOSES DIGITALES LAUTSPRECHERSYSTEM
Title (fr)
SYSTEME NUMERIQUE DE HAUT-PARLEURS SANS FIL
Publication
Application
Priority
- US 9928686 W 19991203
- US 11070598 P 19981203
Abstract (en)
[origin: WO0076272A1] A digital wireless loudspeaker system includes an audio transmission device for selecting and transmitting digital audio data, and wireless speakers for receiving the data and broadcasting sound. The audio transmission device selects digital audio data together with a sample clock from a stereo compact disk, or decoded DVD data. The sample clock clocks an element that generates frames of data and adds error protection. Status messages are included in the transmission frames to control speaker attributes such as speaker group, enabling or disabling a sub-woofer, and volume of the loudspeaker digitally. These transmission frames are clocked into an RF transmitter and transmitted to the speakers. The received bit stream and symbol clock are output from the RF receiver in each speaker and input to a framing and error protection decoder and a sample clock generator. The recovered audio sample data and sample clock are input to a digital to speaker input conversion and channel selector.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H04R 5/02 (2013.01); H04S 3/00 (2013.01); H04R 2420/07 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0076272 A1 20001214; WO 0076272 A8 20010308; WO 0076272 A9 20020411; AT E263474 T1 20040415; AU 2039500 A 20001228; DE 69916104 D1 20040506; DE 69916104 T2 20050217; DK 1135969 T3 20040802; EP 1135969 A1 20010926; EP 1135969 B1 20040331
DOCDB simple family (application)
US 9928686 W 19991203; AT 99964082 T 19991203; AU 2039500 A 19991203; DE 69916104 T 19991203; DK 99964082 T 19991203; EP 99964082 A 19991203