Abstract: A signal may be received in accordance with a protocol stack having a first portion (400) that contains a control layer and a stream layer, and a second portion (401) that contains a physical layer and a MAC layer. The first portion may invoke an application program interface (API 1402) to instruct the second portion to replace a current set of signal acquisition parameters with an initial set of signal acquisition parameters.

Abstract: Methods and apparatus for service acquisition in a broadcast system. In an aspect, a method includes detecting whether a loss of service has occurred, and initiating acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed. An apparatus includes interface logic configured to detect whether a loss of service has occurred, and processing logic configured to initiate acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

Abstract: Packets of information may be received in accordance with a protocol stack having a first portion (400) that contains a control layer and a stream layer, and a second portion (401) that contains a physical layer and a MAC layer. The second portion also maintains a group of inbound packets and respectively associated error statuses. The first portion invokes an application programming interface (API 1301,1302,1401,1402) to instruct the second portion to perform an action with respect to at least one of the inbound packets, which action is related to the error status associated with that packet.

Abstract: A signal may be received in accordance with a protocol stack having a first portion (400) that contains a control layer and a stream layer, and a second portion (401) that contains a physical layer and a MAC layer. The first portion may invoke an application program interface (API 1402) to instruct the second portion to replace a current set of signal acquisition parameters with an initial set of signal acquisition parameters.

Abstract: Methods and apparatus for service acquisition in a broadcast system. In an aspect, a method includes detecting whether a loss of service has occurred, and initiating acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed. An apparatus includes interface logic configured to detect whether a loss of service has occurred, and processing logic configured to initiate acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

Abstract: An apparatus is configured to receive a signal in accordance with a protocol stack comprising a physical layer, MAC layer, control layer and stream layer. The apparatus includes a receiver stack processing system configured to provide the control and stream layers, a media processing system configured to provide the physical and MAC layers, and an application programming interface (API) to support service requests from the receiver stack processing system to the media processing system.

Abstract: A wireless communications device configured to operate in a multimedia broadcast system is disclosed. The wireless communications device includes a receiver configured to receive a plurality of video streams each comprising intra-coded and inter-coded video frames. The wireless communications device also includes a video decoder, and a processing unit configured to switch the video streams to the video decoder. The processing unit is further configured to receive a prompt to switch from a first one of the video streams to a second one of the video streams, and in response to the prompt, delay switching to the second one of the video streams until an intra-coded video frame is received in the second one of the video streams.

Abstract: Apparatus is disclosed for automatically and simultaneously cleaning both sides of a plurality of workpieces. The workpieces are illustratively thin, fragile slices of brittle material, such as single-crystal silicon wafers. These workpieces are supplied to the cleaning apparatus within a cassette. The cleaning apparatus includes a cassette receiving station, a processing station and guide means extending from the cassette receiving station through the processing station. The guide means is adapted to receive edge portions of the workpieces. A transfer arm is extended from a retracted position through the cassette so that a first portion of the transfer arm pushes a workpiece along the guide means through the processing station. The transfer arm is then retracted and a second portion of the transfer arm pushes the workpiece along the guide means back through the processing station and into the cassette.