Patents Assigned to Nasaco Electronics (Hong Kong) Ltd.
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Patent number: 7212787Abstract: A wireless audio transmission and reception system includes a pulse width amplifier, an up-converter, a transmitter, a receiver, a down-converter, an integrator, and a power amplifier to transfer an analog signal to a transducer such as a speaker. The pulse width amplifier receives an analog signal and modulates a pulse width of a timing signal with the analog signal. The pulse width of the timing signal is modulated such that the pulse width is proportional to the amplitude of the analog signal, and provides a pulse width modulated signal. The up-converter is in communication with the pulse width amplifier to receive the pulse width modulated signal and convert the pulse width modulated signal to a modulated carrier signal. The transmitter in communication with the up-converter to receive the modulated carrier signal and to transfer the modulated carrier signal wirelessly.Type: GrantFiled: November 29, 2001Date of Patent: May 1, 2007Assignee: NASACO Electronics (Hong Kong) Ltd.Inventors: Eric Wu, So Yan Kwan
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Patent number: 7046999Abstract: A wireless communication system that transmits content signals and remote control signals between a content retention and distribution system and a content reproduction terminal over a half-duplex channel such as an RF channel having the same frequency band. The wireless communication system includes a base station and a remote station. The base station formats and transmits the content signal over the half-duplex channel. The remote station receives the transmitted content signal and transfers the content signal to the content reproduction terminal. The content reproduction terminal has an input device to create remote control signals for the content retention and distribution system. The remote station receives the remote control signals from the content reproduction terminal and transmits the remote control signal to the base station for transfer to the content retention and distribution system on the half-duplex channel.Type: GrantFiled: May 30, 2003Date of Patent: May 16, 2006Assignee: Nasaco Electronics (Hong Kong) Ltd.Inventors: Ka Ming Wu, Yan Kwan So
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Patent number: 6993283Abstract: A wireless transmission and reception system to convey analog signals within a local transmission area. The wireless transmission system includes a first encoder to receive an analog signal, to digitize the analog signal, and to compress the digitized analog signal using MP-3 compression; a modulator to modulate a carrier signal with the compressed digitized analog signal; and a transmitter for wireless transference of the modulated RF carrier. The reception system has a receiver to acquire the modulated carrier signal; demodulator to extract the compressed digitized analog signal from the modulated carrier signal; and a first decoder to decompress the compressed digitized analog signal using MP-3 decompression and to convert the digitized analog signal to a reproduction of the analog signal.Type: GrantFiled: July 16, 2001Date of Patent: January 31, 2006Assignee: Nasaco Electronics (Hong Kong) Ltd.Inventors: Wu Ka Ming, So Yan Kwan
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Publication number: 20040242242Abstract: A wireless communication system that transmits content signals and remote control signals between a content retention and distribution system and a content reproduction terminal over a half-duplex channel such as an RF channel having the same frequency band. The wireless communication system includes a base station and a remote station. The base station formats and transmits the content signal over the half-duplex channel. The remote station receives the transmitted content signal and transfers the content signal to the content reproduction terminal. The content reproduction terminal has an input device to create remote control signals for the content retention and distribution system. The remote station receives the remote control signals from the content reproduction terminal and transmits the remote control signal to the base station for transfer to the content retention and distribution system on the half-duplex channel.Type: ApplicationFiled: May 30, 2003Publication date: December 2, 2004Applicant: Nasaco Electronics (Hong Kong) Ltd.Inventors: Ka Ming Wu, Yan Kwan So
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Publication number: 20030129945Abstract: A wireless audio transmission and reception system includes a pulse width amplifier, an up-converter, a transmitter, a receiver, a down-converter, an integrator, and a power amplifier to transfer an analog signal to a transducer such as a speaker. The pulse width amplifier receives an analog signal and modulates a pulse width of a timing signal with the analog signal. The pulse width of the timing signal is modulated such that the pulse width is proportional to the amplitude of the analog signal, and provides a pulse width modulated signal. The up-converter is in communication with the pulse width amplifier to receive the pulse width modulated signal and convert the pulse width modulated signal to a modulated carrier signal. The transmitter in communication with the up-converter to receive the modulated carrier signal and to transfer the modulated carrier signal wirelessly.Type: ApplicationFiled: January 9, 2002Publication date: July 10, 2003Applicant: Nasaco Electronics (Hong Kong) Ltd.Inventors: Eric Wu, So Yan Kwan
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Publication number: 20030100270Abstract: A wireless audio transmission and reception system includes a pulse width amplifier, an up-converter, a transmitter, a receiver, a down-converter, an integrator, and a power amplifier to transfer an analog signal to a transducer such as a speaker. The pulse width amplifier receives an analog signal and modulates a pulse width of a timing signal with the analog signal. The pulse width of the timing signal is modulated such that the pulse width is proportional to the amplitude of the analog signal, and provides a pulse width modulated signal. The up-converter is in communication with the pulse width amplifier to receive the pulse width modulated signal and convert the pulse width modulated signal to a modulated carrier signal. The transmitter in communication with the up-converter to receive the modulated carrier signal and to transfer the modulated carrier signal wirelessly.Type: ApplicationFiled: November 29, 2001Publication date: May 29, 2003Applicant: Nasaco Electronics (Hong Kong) Ltd.Inventors: Eric Wu, So Yan Kwan