CPC Class H04N

Various arrangements of wireless tracking systems are presented. A tag device may be presented that include a first plurality of antennas. Each antenna of the first plurality of antennas may have an antenna radiation pattern pointed in a different direction. The tag device may include a wireless transmitter interface that transmits via each antenna of the first plurality of antennas. The wireless tracking system may also include a tracker device that tracks a direction to the tag device. The tracker device may include a second plurality of antennas. Each antenna of the second plurality of antennas may have an antenna radiation pattern pointed in a different direction. The tracker device may include a wireless interface receiver that performs a plurality of signal strength measurements using the second plurality of antennas.

Embodiments are provided for satellite volume control. An example method includes receiving an input at a playback device to adjust a volume for a plurality of playback devices that are grouped for synchronous playback of audio content, wherein the plurality of playback devices includes the playback device. The method also includes sending a first message over a network from the playback device to a device associated with the plurality of playback devices, the first message including information based on the input, wherein the information is used to adjust the volume of the plurality of playback devices. The method also includes receiving a second message at the playback device over the network, the second message including information for the volume of the playback device, wherein the volume is based on the adjusted volume of the plurality of playback devices.

A reciprocal approximation circuit has a first iteration circuit for generating an approximate reciprocal value of an operand. The operation of the first iteration circuit is controlled by two bits of the operand, which indicate a range in which the operand lies. The first iteration circuit uses hardware friendly initial values based on the two bits for generating the approximate reciprocal value. The reciprocal approximation circuit does not require any additional circuit for selecting an initial value for the first iteration circuit.

A content delivery apparatus includes an external input portion, a content reception portion and a delivery portion. To the external input portion, first content having at least a fundamental component is inputted. The content reception portion receives second content having a fundamental component and an extended component. When delivering the first content, the delivery portion delivers the fundamental component of the first content to a client apparatus more than once.