Patent application number | Description | Published |
20100128904 | DYNAMIC VOLUME CONTROL AND MULTI-SPATIAL PROCESSING PROTECTION - A disclosed system and method dynamically controls the perceived volume of a stereo audio program including left and right channel signals. The system comprises: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and an excessive spatial processing protection processor configured and arranged for controlling the level of a difference signal, created as a function of the right channel signal subtracted from the left channel signal (L−R), relative to the level of a sum signal, created as a function of the right channel signal plus the left channel signal;; wherein the excessive spatial processing protection processor processes the audio signals so as to control the difference (L−R) signal relative to the sum (L+R) signal. A system and method are also provided for dynamically controlling the perceived volume of a stereo audio program including left and right channel signals, comprising: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and a program change detector configured and arranged to provide a program change signal indicating that the volume of the left and right channel signals has dropped below a threshold level for at least a threshold time period so as to anticipate a possible change in the sound level of the left and right channel signals; wherein the dynamic volume control is responsive to the program change signal. | 05-27-2010 |
20110063034 | SYSTEM AND METHOD FOR DIGITAL CONTROL OF AMPLIFIER GAIN WITH REDUCED ZIPPER NOISE - A digitally-controlled analog gain circuit supports at plurality of gain settings in which gain changes are made from a first setting to a new setting in response to a clocking signal of a non-uniform rate. The non-uniform rate clocking signal can be created pseudo randomly by applying a periodic sequence of clock pulses to a linear feedback shift register. Alternatively, the non-uniform rate clock signal can be created by applying a noise source to a phase detector input of a phase locked loop. The clocking signal can be generated by an oscillator, or as a sequence of pulses output by a zero crossing detector. Finally, the gain circuit can apply positive gain to the signal. Alternatively, the gain circuit can apply a negative gain (attenuation) to the signal. | 03-17-2011 |
20110103466 | BTSC TECHNIQUES - The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 05-05-2011 |
20110134992 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 06-09-2011 |
20110205429 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 08-25-2011 |
20110235705 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 09-29-2011 |
20110243333 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 10-06-2011 |
20110280407 | Compressor Based Dynamic Bass Enhancement with EQ - A system for and method of enhancing the low frequency response of a loudspeaker for relatively low input level audio signals and protect the loudspeaker for relatively high input level audio signals is disclosed. The system comprises: a crossover network configured so separate an audio input signal into at least two frequency bands including a low frequency band; and a signal compressor responsive to the energy level of the low frequency portion of an input audio signal in the low frequency band and configured to provide amplification gain on the low frequency portion of the input signal when the energy level of the low frequency portion of the input signal is relatively low so as to enhance the low frequency response of the loudspeaker, and attenuation of the low frequency portion of the input signal when the energy level of the low frequency portion of the input signal is relatively high so as to protect the loudspeaker from being overdriven. The system is configurable so that it can be used to enhance the loudspeakers of audio and video play devices such as televisions and computers. | 11-17-2011 |
20120075528 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means; a right high pass filter means; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 03-29-2012 |
20120082206 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 04-05-2012 |
20120087502 | BTSC ENCODER - The disclosed BTSC encoder includes a left high pass filter means; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal. | 04-12-2012 |
20130108055 | DYNAMIC VOLUME CONTROL AND MULTI-SPATIAL PROCESSING PROTECTION | 05-02-2013 |
Patent application number | Description | Published |
20090041252 | EXCHANGE OF NETWORK ACCESS CONTROL INFORMATION USING TIGHTLY-CONSTRAINED NETWORK ACCESS CONTROL PROTOCOLS - In general, techniques are described for securely exchanging network access control information. The techniques may be useful in situations where an endpoint device and an access control device perform a tightly-constrained handshake sequence of a network protocol when the endpoint device requests access to a network. The handshake sequence may be constrained in a variety of ways. Due to the constraints of the handshake sequence, the endpoint device and the access control device may be unable to negotiate a set of nonce information during the handshake sequence. For this reason, the access control device uses a previously negotiated set of nonce information and other configuration information associated with the endpoint device as part of a process to determine whether the endpoint device should be allowed to access the protected networks. | 02-12-2009 |
20090313373 | NETWORK POLICY EVALUATION - A device may include an interface to send policy information to an evaluation module, where the policy information is related to a group of policies, and receive a group of results from the evaluation module, where the group of results indicates whether the status of a source device complies with the croup of policies. The interface may send an instruction to a destination device configured to implement at least a subset of the policies with respect to the source device based on the instruction. | 12-17-2009 |
20100070800 | AUTOMATIC HARDWARE-BASED RECOVERY OF A COMPROMISED COMPUTER - In general, techniques are described for hardware-based detection and automatic restoration of a computing device from a compromised state. Moreover, the techniques provide for automatic, hardware-based restoration of selective software components from a trusted repository. The hardware-based detection and automatic restoration techniques may be integrated within a boot sequence of a computing device so as to efficiently and cleanly replace only any infected software component. | 03-18-2010 |
20100153781 | SERVER-TO-SERVER INTEGRITY CHECKING - A method performed by a primary server includes receiving integrity criteria and sending a health check request to a secondary server based on the received integrity criteria. The method also includes receiving integrity information from the secondary server and checking the integrity information against the integrity criteria. The method further includes initiating a non-compliance action if the integrity information does not comply with the integrity criteria. | 06-17-2010 |
20110258479 | SERVER-TO-SERVER INTEGRITY CHECKING - A method performed by a primary server includes receiving integrity criteria and sending a health check request to a secondary server based on the received integrity criteria. The method also includes receiving integrity information from the secondary server and checking the integrity information against the integrity criteria. The method further includes initiating a non-compliance action if the integrity information does not comply with the integrity criteria. | 10-20-2011 |