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7613308 |
Remote control interface for replacement vehicle stereos
An interface circuit for interconnecting the fixed controls of a vehicle to a replacement stereo. The interface circuit is capable of receiving control signals from fixed controls, such as steering...
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7561702 |
Method and system for the pre-processing and post processing of an audio signal for transmission on a highly disturbed channel
Method and system adapted to modifying an audio signal or speech signal comprising a step in which the frequency spectrum S(k) of the signal is converted by the application of a non-linear...
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RE40836 |
Apparatus and methods for providing text information identifying audio program selections
Apparatus and methods are disclosed for providing text information which identifies audio program selections, such as musical selections, stored on a compact disk (CD). Digital identification...
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7551743 |
Noise reduction apparatus and audio output apparatus
The FM broadcast is received and the FM demodulated FM composite signal is stereo demodulated, and when the high band components of the demodulated signal are few, the correction is conducted by...
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7542784 |
High quality, low power, wireless audio system
The invention relates to the field of wireless communications and more specifically to an high quality, low power wireless audio system. More specifically, the invention comprises an audio source...
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7539316 |
Configurable filter for processing television audio signals
A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and...
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7536019 |
Audio system for use with a vehicle
An audio system for use in a passenger compartment of a vehicle. The system includes a front-driver side speaker unit and a front-passenger side speaker unit to cooperatively emit audio sound to...
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7515935 |
Method and system for flexible FM tuning
A method and system for flexible FM tuning are provided and may include tuning to a particular frequency within a range of FM channels based on an IF frequency that includes an integer multiple of...
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7515889 |
Scaling adjustment using pilot signal
A demodulator ( 10 ) converts television signals to video baseband signals and audio baseband signals including stereo signals representing a right channel signal value, a left channel signal value...
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7486796 |
Stereo receiver for controlling continuously degree of separation
A stereo receiver of a simple structure is disclosed capable of continuously controlling the degree of separation of left and right voice signals in accordance with the level of electric field...
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7472058 |
Automatic audio source detection for capture devices
A method for selecting an audio source when capturing audio data with at least one capture device includes connecting an audio source to an audio input port of the capture device, turning off the...
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7471987 |
Determining location of an audience member having a portable media monitor
Systems, methods and devices for gathering data concerning media usage by predetermined audience members. An audience measurement code in acoustic energy produced by a media receiver is detected by...
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7463310 |
BTSC pilot signal lock
An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit is described. By digitally generating a sinusoid that is...
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7457420 |
Method and system for detecting signal modes in a broadcast audio transmission
A Japanese BTSC audio broadcast signal has three modes of transmission: mono, stereo, or dual mono. The control channel centering at 3.5 fH is one of the three channels in the J-BTSC signal, and...
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7451078 |
Methods and apparatus for identifying media objects
A method, apparatus and computer memory are provided for generating an audio fingerprint of an audio recording. A memory stores stable frequency family data corresponding to a plurality of stable...
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7447629 |
Audio coding
A method of encoding a multi-channel audio signal including at least a first signal component (LF), a second signal component (LR) and a third signal component (RF). The method comprises the steps...
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7428308 |
Transmitting and reproducing stereophonic audio signals
Apparatus and method for transmitting and reproducing stereophonic audio signals are disclosed. The method comprises splitting first and second channels into two frequency bands, combining the...
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7406302 |
Digital FM stereo receiver architecture
Systems and techniques for digital processing of FM stereo signals are described. A carrier signal such as a 38 kHz carrier may be recovered and used to process a difference signal such as a left...
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7403624 |
BTSC encoder and integrated circuit
A BTSC encoder includes dual channel ADC, sync separator, audio processor, filtering device, and a composite audio signal generating device. The filtering device includes a first filter for...
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7400859 |
Combined modulator and MP3 player having socket power supply adapter and/or universal connector
A combined digital audio file player and modulator. In one embodiment, the invention is an apparatus comprising: an elongate housing having a distal end and a proximal end; a socket power adapter...
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7392195 |
Lossless multi-channel audio codec
A lossless audio codec segments audio data within each frame to improve compression performance subject to a constraint that each segment must be fully decodable and less than a maximum size. For...
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7386004 |
Digital broadcast system
A broadcasting system which can monitor all input devices for their operating conditions, the broadcasting system includes input devices 1 1 - 1 M for receiving sound, output devices 3 1 - 3 N ...
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7376476 |
Methods for changing time intervals of the occurrence of audio information from local and remote sites
A method of processing audio information for broadcast to an audience can include changing first audio information from occurring in a first time interval to occurring in a second time interval to...
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7366488 |
Digital carrier-recovery scheme for FM stereo detection
Systems and techniques for digital processing of FM signals. Digital processing may include recovering a carrier signal at a second frequency based on a reference signal at a first frequency.
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7346173 |
Method and circuit assemblage for influencing the treble reproduction of an audio signal
A method for influencing, e.g., for decreasing, the treble reproduction of an audio signal for reproduction obtained from a received signal, the received field strength and reception quality of the...
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7343015 |
Method and apparatus for high fidelity wireless stereophonic transmission utilizing dual frequency carriers
A method and system is disclosed for transmitting two related channels of signals through the air. A first channel of signals is modulated with a first carrier frequency, and a second channel of...
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7304594 |
Transmitting and receiving device and transmitting device and receiving device
According to one aspect of this invention, there is provided a transmitting and receiving device including a transmitting device having a pulse width modulation encoder which generates a pulse...
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7253753 |
Method and apparatus of performing sample rate conversion of a multi-channel audio signal
A method and apparatus are disclosed for performing sampling rate conversion of an audio signal from a first sampling rate to any of a plurality of higher sampling rates using a single set of...
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7181018 |
Digital stereo recovery circuitry and method for radio receivers
Stereo recovery circuitry for a digital receiver is disclosed that provides increased accuracy and efficiency in recovering stereo signal information from transmitted stereo signals. The stereo...
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7149312 |
Method and device to retrieve RDS information
To retrieve RDS information by filtering and transforming an incoming multiplex signal (m(t)) into a RDS baseband signal, an amplitude modulated RDS signal (m a (t), m c (t)) is derived on basis of...
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7136346 |
Record carrier method and apparatus having separate formats for a stereo signal and a data signal
A record carrier carries a stereo signal and a data signal which includes a first data portion and a remaining data portion. A first channel on the record carrier includes a composite signal which...
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7133527 |
Stereodecoder
An arrangement for decoding a stereo multiplex signal, comprising a baseband sum signal (L+R), a difference signal (L−R) which is amplitude-modulated on a suppressed sub-carrier and a pilot...
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7110549 |
Noise reduction in a stereo receiver
A method to denoise a stereo signal comprising a stereo sum signal and a stereo difference signal, performs a frequency selective stereo to mono blending based on the masking effect of the human...
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7106809 |
AM/FM/IBOC receiver architecture
An RF receiver operates to receive broadcast RF signals that include at least one of an analog portion and a digital portion. The RF receiver performs processing of the analog portion and/or the...
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7103186 |
Stereo/two-tone demodulator
In a stereo/two-tone demodulator for demodulating an intermnediate-frequency signal having stereo or two-tone sound signals modulated on a first and a second sound carrier, the second sound carrier...
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7092460 |
Digital stereo demultiplexer
In a stereo demultiplexer receiving a frequency demodulated stereo-multiplex signal (m(t)) which comprises at least a stereo-difference signal (m d (t)), a stereo-sum signal (m s (t)) and a pilot...
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7079657 |
System and method of performing digital multi-channel audio signal decoding
A system and method are disclosed for performing digital multi-channel decoding of a BTSC composite audio signal. Analog-to-digital conversion is performed on a composite analog audio signal at a...
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7068322 |
Broadcasting receiver
A remote control transmitter is provided with an AUDIO key for switching an audio mode in sound multiplex broadcasting and an ENTER key for determining various types of selections. When the ENTER...
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7065217 |
Apparatus and method for multichannel sound reproduction system
The sound reproduction of a multichannel sound reproduction system with a plurality of speakers which is connected to the output of an FM stereo receiver is controlled by a control signal derived...
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7046999 |
Half-duplex wireless audio communication system
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...
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7046811 |
Stereo demultiplexer
For the noise reduction of an audio signal generated by stereo-demultiplexing of a frequency-modulated stereo multiplex signal (S FM (t)) a filtering within the signal path to generate the stereo...
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6978026 |
Circuit arrangement for gaining a stereo subcarrier and an RDS carrier
According to the invention, a circuit arrangement for gaining a 38 kHz stereo subcarrier and a 57 kHz RDS carrier for decoding a stereo signal comprised in a demodulated FM signal and/or an RDS...
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6968062 |
Transmitter of infrared transmission system and reproducing apparatus comprising headphone device
This invention is directed to a transmitting apparatus adapted for carrying out transmission of audio signals by using infrared rays and a reproducing apparatus using a headphone device adapted to...
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6961432 |
Multidescriptive coding technique for multistream communication of signals
In a digital audio broadcast system, to utilize transmission bandwidth efficiently, representations of a stereo audio signal for transmission are generated in accordance with an inventive...
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6954534 |
Multiple signal carrier transmission apparatus and method
A multiple signal carrier transmission apparatus and method for broadcasting stereo sounds to an audio output device uses three related carrier frequencies on which are modulated the sum of first...
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6947564 |
Stereophonic spatial expansion circuit with tonal compensation and active matrixing
In a stereophonic expansion circuit, the (L+R) sum signal is spectrally modified by increasing the bass and treble frequencies relative to the midrange so as to compensate for a midrange frequency...
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6931136 |
Infrared emitter
An infrared emitter comprises a preamplifier, an infrared RF emitter, an infrared channel controller and a photodiode emitting-medium. With the emitter, by switching between two channels with an...
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6909787 |
Method and related apparatus for stereo vocal cancellation
Method and related apparatus for canceling vocal portions containing in two signals of two stereo channels and providing two corresponding output signals. The method includes: generating a mono...
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6859238 |
Scaling adjustment to enhance stereo separation
A demodulator ( 10 ) converts television signals to video baseband signals and audio baseband signals including stereo signals representing a right channel signal value and a left channel signal...
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6823071 |
Frequency modulation multiplex demodulation device
A frequency modulation (FM) multiplex demodulation device is provided, in which the feeling of stereo is maintained excellent and the offensive noise to the ears can be reduced. The FM multiplex...
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