Abstract: Interference cancellation is performed in a communication system. A signal associated with the users is received to produce a received signal. A set of regeneration factors associated with the users is determined based on the received signal. A frequency range associated with a first user from the users has at least a portion overlapping with at least a portion of a frequency range associated with a second user from the users. A time range associated with the first user from the users has at least a portion overlapping with at least a portion of a time range associated with the second user from the users. A regenerated signal associated with each user from the users is modified based on the determined regenerated factor associated with that user to produce a modified regenerated signal for each user.

Abstract: A system, method and apparatus for implementing a wireless point-to-point interface that securely and robustly delivers digital content from a generalized content source to a generalized content sink. The system, method and apparatus performs in a manner that is sufficiently secure and robust to serve as a replacement for the delivery of HDMI content over cable. The system, method and apparatus is also applicable to the delivery of other types of content traditionally delivered over cable, including but not limited to Digital Video Interface (DVI) content, composite video (CVSB) content, S-video content, RGB video content, YUV video content, and/or various types of audio content.

Abstract: An audio/video switching system is described that selectively enables multiple heterogeneous audio/video sources to transmit data to a single audio/video sink such as a display or audio/video repeater. The audio/video switching system supports format conversion to enable, for example, multiple different audio/video formats to be transmitted to the audio/video sink using a single link. In some implementations, the single link is a high-bandwidth, high-quality wireless link for carrying high definition and standard definition audio/video signals. Various home theater systems that include such an audio/video switching system are also described herein.

Abstract: The present invention is directed to methods and systems for enabling secure and efficient wireless transmission of HDCP-encrypted high definition (HD) signals. In one aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content to enable direct wireless transmission of HD content. In another aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content that are compatible with HDCP encryption of content. In a further aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content while maintaining a high quality of content.

Abstract: The present invention is directed to a system, method, and apparatus to transmit/receive TMDS signals using general purpose differential transmitter and receivers. In an embodiment, the general purpose differential transmitter and receivers are designed to operate with differential signaling schemes such as LVDS and LVPECL. In one aspect, embodiments according to the present invention enable the re-configuration of existing and fully-characterized LVDS/LVPECL transmitter/receiver cells to support TMDS (using minimal sets of external components). This provides considerable cost and development time savings, thereby allowing the development of products much more expediently. In another aspect, embodiments according to the present invention provide interfacing methods and systems between differential signaling schemes such as LVDS/LVPECL and TMDS.

Abstract: A system, method, and apparatus that improves the efficiency of HD content delivery systems. An embodiment of the invention eliminates unnecessary encoding overhead due to TMDS encoding in HD content delivery systems. An embodiment of the invention further allows for increased error protection at lower overhead in HD content delivery systems. Furthermore, embodiments of the present invention provide less expensive and more efficient techniques for transmitting content protection information in HD content delivery systems. The invention is applicable to HD content delivery systems such as DVI and HDMI systems, including systems that employ novel data transmission techniques of the present invention as well as conventional content delivery systems. The invention is applicable to copper and fiber HD content delivery systems.

Abstract: The present invention is directed to a system, method and apparatus for implementing a content delivery system that includes at least one bi-directional distribution system between a generalized content source and a generalized content sink. The bi-directional distribution system enables the content source and the content sink to coordinate with each other to determine the capabilities of the content distribution system, the content source, and the content sink, and to best control the content format accordingly.

Abstract: A first downlink transmission beam and a second downlink transmission beam is determined based on a received user-derived signal. The first downlink transmission beam is substantially uncorrelated with the second downlink transmission beam. The first downlink transmission beam is associated with a portion within a first sector. The second downlink transmission beam is associated with a portion within a second sector. A first signal is diversity encoded to produce a first diversity-encoded signal. A second signal is diversity encoded to produce a second diversity-encoded signal. The first diversity-encoded signal is sent over the first downlink transmission beam. The second diversity-encoded signal is sent over the second downlink transmission beam.

Abstract: Method and apparatus for high resolution tracking via mono-pulse beam-forming in a communication system in which the capacity and range of mobile or fixed wireless communication base stations are improved by implementing a single or multiple antenna beam per signal path. Adaptive beam-forming based on up-link direction-of arrival estimation can be performed without using the above-mentioned computationally intensive techniques.

Abstract: Method and apparatus for high resolution tracking via mono-pulse beam-forming in a communication system in which the capacity and range of mobile or fixed wireless communication base stations are improved by implementing a single or multiple antenna beam per signal path. Adaptive beam-forming based on up-link direction-of arrival estimation can be performed without using the above-mentioned computationally intensive techniques.

Abstract: A method of testing the performance of real time DSP algorithms after customer code has been added and includes the steps of embedding a signature equation in the DSP code that calculates to a given signature value at the output of the DSP when running a test mode program through the DSP.

Abstract: A first downlink transmission beam and a second downlink transmission beam is determined based on a received user-derived signal. The first downlink transmission beam is substantially uncorrelated with the second downlink transmission beam. The first downlink transmission beam is associated with a portion within a first sector. The second downlink transmission beam is associated with a portion within a second sector. A first signal is diversity encoded to produce a first diversity-encoded signal. A second signal is diversity encoded to produce a second diversity-encoded signal. The first diversity-encoded signal is sent over the first downlink transmission beam. The second diversity-encoded signal is sent over the second downlink transmission beam.

Abstract: Interference cancellation is performed in a communication system. A signal associated with the users is received to produce a received signal. A set of regeneration factors associated with the users is determined based on the received signal. A frequency range associated with a first user from the users has at least a portion overlapping with at least a portion of a frequency range associated with a second user from the users. A time range associated with the first user from the users has at least a portion overlapping with at least a portion of a time range associated with the second user from the users. A regenerated signal associated with each user from the users is modified based on the determined regenerated factor associated with that user to produce a modified regenerated signal for each user.

Abstract: A method and communication system (10), which can be used in a full, pseudo full, or half duplex speaker-phone system, includes a circuit (14) to remove a frequency component from a received signal to output a modified received signal, and a speaker (18) to convert the modified received signal to an acoustic signal (20). The circuit (14) may be, for example, a notch filter, which may remove a sharp frequency range between about 1250 Hz and 1550 Hz. A microphone (26) converts a second acoustic signal (24) to an electrical signal for transmitting, and a detector (30) produces a detector output if the removed frequency is present in the acoustic signal (24). A circuit (34) is also provided to modify a circuit parameter applied to the received signal when the detector (30) produces a detector output. The parameter may be, for instance an attenuation applied to the received signal.