PLC intercom/monitor
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United States of America Patent
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Apr 3, 2007
Grant Date -
Aug 24, 2006
app pub date -
Feb 22, 2005
filing date -
Feb 22, 2005
priority date (Note) -
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Abstract
A digital intercom device consistent with certain embodiments uses power line communication (PLC). A power line interface connects to a power line serving as a communication medium. An audio codec is coupled to the power line interface for encoding and decoding digital data to and from data suitable for use by the power line interface. A digital to analog converter receives digital decoded data from the codec and converts the digital coded data to a received analog signal. A receive audio amplifier amplifies the received analog signal to a level adequate to drive a speaker. A transmit audio amplifier amplifies a transmit audio signal and provides an amplified transmit audio signal as an output. An analog to digital converter converts the amplified transmit audio signal to a digital representation thereof and passes the digital representation to the codec. A control processor controls operation of the interface and the audio codec. A switch interface receiving a signal from a push-to-talk switch, which causes the codec to encode the digital representation and the power line interface to place an OFDM modulated version of the digital representation onto the power line. This abstract should not be considered limiting since other embodiments may incorporate more, fewer or different elements that those described in this abstract.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- SONY CORPORATION;SONY ELECTRONICS INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Dawson, Thomas Patrick | Escondido, CA | 47 | 1108 |
Iwamura, Ryuichi | San Diego, CA | 129 | 6034 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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