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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...
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...
7337111 Use of voice-to-remaining audio (VRA) in consumer applications  
Systems provide an audio/visual output to each of a plurality of listeners in a manner that permits individualized audio adjustment, wherein audio comprises a first signal that is substantially...
7266501 Method and apparatus for accommodating primary content audio and secondary content remaining audio capability in the digital audio production process  
The invention enables the inclusion of voice and remaining audio information at different parts of the audio production process. In particular, the invention embodies special techniques for...
7260225 Method and device for processing a stereo audio signal  
In a device for processing a stereo audio signal having a first channel and a second channel the stereo signal is at first analyzed to obtain a measure for a quantity of bits required by a coder to...
7243073 Method for realizing virtual multi-channel output by spectrum analysis  
A method for realizing virtual multi-channel by spectrum analysis is disclosed. The low-frequency-effect sound data is obtained by averaging sound data of left and right channels in the two-channel...
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...
7065218 Method of generating a left modified and a right modified audio signal for a stereo system  
The invention relates to a method of generating a left modified and a right modified audio signal for a stereo system from multichannel audio signals (X L , X R , X LS , X RS , and X C ) with a...
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...
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...
6658116 Stereo radio receiver  
A stereo radio receiver has a channel separation stage for setting an optimal channel separation of the left audio channel from the right audio channel, even under sufficient receiving field...
6535608 Stereo broadcasting receiving device  
A stereo broadcasting receiving device comprises pseudo stereo signal generation means for generating a pseudo left stereo signal and a pseudo right stereo signal from an L+R signal, first...
6522750 Method and corresponding system for influencing the stereo channel separation of an audiosignal  
A method for influencing the channel separation of an audio signal to be reproduced, obtained from a received radio signal, in a radio receiver, as well as a radio receiver for carrying out the...
6295362 Direct digital synthesis of FM signals  
A digital FM signal generator allows the generation of a modulated FM signal for broadcasting without the need for an analog modulator. The signal generator includes a digital signal processor...
6173022 Synchronizing audio signal samples taken at different sampling rates  
Audio signal samples taken at different sampling rates are synchronized. A plurality of channels of audio data are sampled at different rates and recognizable synchronization data are added to...
6002774 Arrangement, a system, a circuit and a method for enhancing a stereo image  
A stereophonic audio signal processing arrangement for variably enhancing a stereo image, wherein the stereo image enhancement is reduced at high signal levels so as to reduce distortion. The...
5784465 Stereo receiver  
The invention is directed to reducing noises of a low density without causing the listener to feel a sense of incongruity. A received signal is subjected to frequency discrimination. The sound...
5771293 Switching arrangement for mobile radio receivers  
In the case of a switching arrangement for mobile radio receivers having a device for adjusting the stereo playback portion relative to the mono playback portion as a function of multipath effects,...
5701345 Multipath interference reduction system and method  
A multipath interference reduction system and method for smoothly reducing noise associated with FM stereo signal reception with an adjustable blend. The system includes a peak detector for...
5671286 Strategy for controlling FM stereo separation and frequency response in noisy reception environments  
A control for an FM receiver reduces multipath distortion by reducing stereo separation and high frequency response in the demultiplexed signal. The receiver includes an FM detector including a...
5661810 Circuit arrangement for deriving signals for masking audio signals  
The circuit arrangement includes a first low-pass filter (2) for filtering an input signal (H3) proportional to the strength of a received radio signal; a second low-pass filter (3) for filtering...
5661809 Radio receiver having digital signal processing  
A radio receiver is provided having digital signal processing, a first and a second auxiliary signal derived from a received stereo multiplex signal, the first auxiliary signal being dependent upon...
5579395 Stereo decoder with cross-talk compensation  
A circuit arrangement for converting of a stereo signal having a mid-plane signal and a side signal into an output signal for each of two audio signal channels. By this circuit arrangement, a...
5455866 Adaptive separation control for stereophonic radio receiver  
A level detector is provided for detecting the level of a signal demodulated by a detector of a stereophonic radio receiver. A separation controller is provided for producing a separation control...
5432854 Stereo FM receiver, noise control circuit therefor  
A noise control system for a FM stereo receiver senses the presence of noise outside of the FM stereo transmission bandwidth at an output of a FM detector and uses variations of amplitude of the...
5390344 FM audio signal receiver having a characteristic control function  
An FM audio signal receiver having a characteristic control function includes a receiving circuit for receiving an FM broadcast wave, a received state analyzing circuit for analyzing a state of the...
5297209 System for calibrating sound field  
When a stereophonic broadcasting signal is interrupted because an electric field has weakened, a pilot signal 1 which designates that the electric field is not strong enough to separate an...
5202925 FM stereophonic receiver  
An FM stereophonic receiver including an FM detector circuit for detecting an intermediate frequency signal, and for providing a main signal and a sub signal in response to the detected...
5201062 Noise reducing circuit  
A noise reducing circuit for reducing various noise in the output of a receiver. A noise attenuating circuit receives a demodulated signal and attenuates the noise in the demodulated signal in...
5185569 Peak value detecting circuit  
A peak value detecting circuit has a peak voltage holding circuit, a voltage comparing section, a holding voltage control circuit, and a signal output circuit. The peak voltage holding circuit...
5126981 Mixed simulcast circuit  
A mixed simulcast circuit in which the voice signal demodulated in the voice demodulator through the tuner and the voice signal from the outside can be recorded on the recording medium according to...
5113446 Stereo blend controller for FM receivers  
The stereo separation provided by a radio receiver is controlled in dependence on the radio frequency environment at the receiver antenna. The blend curve for determining stereo separation in...
5036543 Noise suppression apparatus for FM receiver  
A noise component is extracted either from FM-detected output or from the so-called signal meter in the intermediate frequency amplifier. The noise component is amplified and rectified to provide a...
5027402 Blend-on-noise stereo decoder  
An FM stereo decoding and separating circuit has an (AM) demodulator multiplier to which is connected the FM stereo composite signal and a signal of dominant frequency equal to and in phase (0°)...
4972482 Fm stereo demodulator  
Levels of a stereo sum signal and a stereo difference signal are detected by first and second level detectors (7, 9), respectively. Outputs of the first and second level detectors (7, 9) are...
4959859 FM Channel separation adjustment  
An attenuator in the composite L-R signal path used for dynamic signal control for blend purposes is limited in range by a static separation adjust signal which attenuates the maximum L-R signal to...
4947431 Held music history circuit  
A circuit is provided which gauges the amount of significant high-frequency spectral energy in the very recent history of the program material and ignores the effects of short noise bursts and...
4901350 Closed-loop audio attenuator  
A closed-loop attenuator for an FM stereo receiver provides attenuation to the L+R audio signal in a controlled and predictable reaction to an ultrasonic noise (USN) voltage presented to an input...
4860354 Arrangement for decoding a stereo multiplex signal  
Arrangement for decoding a stereo multiplex signal, having a baseband stero signal (L+R), a stereo difference signal (L-R) which is amplitude-modulated on a suppressed sub-carrier, and a pilot...
4833715 FM stereo receiver  
An FM stereo receiver includes a level detecting circuit for detecting the received electric field intensity and a pseudo stereo circuit for changing the phase of an entered signal and outputting...
4817151 Selective decoder for compatible FM stereophonic system utilizing companding of difference signal  
A decoder for use in an FM stereo broadcasting system in which the usual difference signal S and a compressed version S' of the difference signal are transmitted, automatically selects on a...
4710958 Circuit for controlling separation and high-cut operation of a stereo demodulator in an FM radio receiver  
A control circuit in an FM radio receiver includes a current mirror circuit which extracts a ripple component caused by a multipath disturbance and superposed on an S-meter output voltage from an...
4703501 Sound multiplex receiver  
A multiplex sound receiver in which a detection signal is extracted from a broadcast to indicate whether the broadcast is monaural, stereo, or multi-lingual. The detection signal is used for...
4694500 Control voltage generating circuit for activating a noise reduction circuit in an FM stereo receiver  
A high-cut and high-blend control voltage generating circuit for activating a noise reduction circuit of an FM stereo receiver is configured to be simply responsive to multipath noises and never to...
4691357 Stereophonic receiving circuit providing improved switching characteristics between stereophonic and monaural modes  
A stereophonic receiving circuit in which automatic switchover from the monaural receiving mode to the stereophonic receiving mode as the input signal strength increases is made more smoothly and...
4688254 Controlled blend for AM stereo receivers  
A control circuit in an AM stereophonic receiver examines a detected signal for occurrences of overmodulation and, when a first given level of overmodulation is reached, begins to turn down the...
4674121 Circuit for detecting the level of noise in FM signal for use in AM/FM receiver  
A circuit is provided for detecting the level of noises in received FM signals in an AM/FM receiver which includes at least an FM intermediate-frequency amplifier, an FM detector connected thereto,...
4646348 Blend control for low voltage stereo decoders  
A blend control circuit for attenuating the L-R signal in a stereo system as a function of a d-c control potential. The circuit is designed to operate with a very low supply voltage and to provide...
4646150 Apparatus and method for stereo television sound  
An apparatus and method are provided for receiving and reproducing stereo television sound. A transmitted television signal is received that contains a first component comprising the sum of first...
4633497 Separation control circuit  
A separation control circuit for a stereophonic receiver in which both the amount of separation between right- and left- channel signals is reduced and the amplification gain for higher frequency...
Matches 1 - 50 out of 87 1 2 >