Abstract: An isochronous back channel is configured between a transmitting device and a receiving device. The isochronous back channel provides retransmission and flow control information from the receiving device to the transmitting device related to a stream of isochronous data packets transmitted from the transmitting device to the receiving device. An isochronous back channel packet for indicating a retransmission or flow control function to perform is configured and transmitted from the receiving device to the transmitting device over the isochronous back channel. A transmitting plug is configured on the receiving device and a receiving plug is configured on the transmitting device for implementing the isochronous back channel. The isochronous back channel packet includes a control instruction that instructs the transmitting device to either reset, stop or resume transmission of the stream of isochronous data packets being transmitted from the transmitting device to the receiving device.

Abstract: An isochronous back channel is configured between a transmitting device and a receiving device. The isochronous back channel provides retransmission and flow control information from the receiving device to the transmitting device related to a stream of isochronous data packets transmitted from the transmitting device to the receiving device. An isochronous back channel packet for indicating a retransmission or flow control function to perform is configured and transmitted from the receiving device to the transmitting device over the isochronous back channel. A transmitting plug is configured on the receiving device and a receiving plug is configured on the transmitting device for implementing the isochronous back channel. The isochronous back channel packet includes a control instruction that instructs the transmitting device to either reset, stop or resume transmission of the stream of isochronous data packets being transmitted from the transmitting device to the receiving device.

Abstract: An isochronous back channel is configured between a transmitting device and a receiving device. The isochronous back channel provides retransmission and flow control information from the receiving device to the transmitting device related to a stream of isochronous data packets transmitted from the transmitting device to the receiving device. An isochronous back channel packet for indicating a retransmission or flow control function to perform is configured and transmitted from the receiving device to the transmitting device over the isochronous back channel. A transmitting plug is configured on the receiving device and a receiving plug is configured on the transmitting device for implementing the isochronous back channel. The isochronous back channel packet includes a control instruction that instructs the transmitting device to either reset, stop or resume transmission of the stream of isochronous data packets being transmitted from the transmitting device to the receiving device.

Abstract: A data transmission method configures a source plug on a source device and a destination plug on a destination device for respectively transmitting and receiving isochronous data packets in non real-time. A stream of non real-time isochronous data packets is formed by first packetizing the data stream into conventional real-time isochronous data packets. Then, either a partial real-time isochronous data packet or multiple real-time isochronous data packets are encapsulated within a data payload portion of a non real-time isochronous data packet depending on the transmission speed. If the transmission speed is less than real-time, then a partial real-time isochronous data packet is encapsulated within the non real-time isochronous data packet. If the transmission speed is greater than real-time, then multiple real-time isochronous data packets are encapsulated within a single non real-time isochronous data packet.

Abstract: The present invention generally relates to synchronization of isochronous data. More specifically, the present invention relates to method and system for synchronizing isochronous data on transmit over IEEE 1394 bus from content unaware devices. In an exemplary embodiment, the system includes an isochronous data processor (IDP) which is controlled by a firmware control. The IDP receives data packets from a device and inserts a data marker at the beginning of each packet. Each data marker and the associated packet are then stored onto a hard disk. When data are retrieved from the hard disk, the IDP uses the data markers to synchronize data delivery to a requesting device so that data delivery is started on a packet which represents the start of a frame. In the event that a packet within the data stream is corrupted, the IDP also uses the data markers to re-synchronize data delivery so that data delivery is re-initiated on a packet which represents the start of the next frame.

Abstract: A system and method for multi-level context switching in an electronic network comprises a control state machine configured to implement a data priority scheme, a return address generator configured to hold and release return addresses for interrupted instruction modules in accordance with the data priority scheme and context information from the electronic network, and a processor configured to process data from the electronic network in accordance with the data priority scheme and the context information. Receive registers stores data received from the electronic network. The control state machine includes a switch address generator and a program counter select. The switch address generator outputs a switch address, which is an address for a first instruction for a selected-context instruction module. The return address generator holds and releases the return addresses, which are addresses of next consecutive instructions, when an instruction module is interrupted for a context switch.

Abstract: An isochronous back channel is configured between a transmitting device and a receiving device. The isochronous back channel provides retransmission and flow control information from the receiving device to the transmitting device related to a stream of isochronous data packets transmitted from the transmitting device to the receiving device. An isochronous back channel packet for indicating a retransmission or flow control function to perform is configured and transmitted from the receiving device to the transmitting device over the isochronous back channel. A transmitting plug is configured on the receiving device and a receiving plug is configured on the transmitting device for implementing the isochronous back channel. The isochronous back channel packet includes a control instruction that instructs the transmitting device to either reset, stop or resume transmission of the stream of isochronous data packets being transmitted from the transmitting device to the receiving device.

Abstract: A data transmission method configures a source plug on a source device and a destination plug on a destination device for respectively transmitting and receiving isochronous data packets in non real-time. A stream of non real-time isochronous data packets is formed by first packetizing the data stream into conventional real-time isochronous data packets. Then, either a partial real-time isochronous data packet or multiple real-time isochronous data packets are encapsulated within a data payload portion of a non real-time isochronous data packet depending on the transmission speed. If the transmission speed is less than real-time, then a partial real-time isochronous data packet is encapsulated within the non real-time isochronous data packet. If the transmission speed is greater than real-time, then multiple real-time isochronous data packets are encapsulated within a single non real-time isochronous data packet.

Abstract: A system and method for context switching in an electronic network comprises a memory configured to store instruction modules, each instruction module corresponding to a context, a processor that executes the instruction modules, and a control state machine. The control state machine selects one of the instruction modules for execution by the processor according to context information from the electronic network. The control state machine includes a switch address generator, a return address register, and a program counter select. The switch address generator outputs a switch address, which is an address for a first instruction for a selected-context instruction module. The return address register stores a return address, which is an address of a next consecutive instruction, when an instruction module is interrupted for a context switch.

Abstract: A media storage device ensures that downloaded digital data is only accessible for a predetermined period of time. An expiration time and the requested digital data are encrypted and downloaded from a content provider and stored as encrypted data on the media storage device. The expiration time indicates a specific time at which the digital data will be made invalid. At the onset of a predetermined time interval, the media storage device obtains a current global time from a secure clock, decrypts the expiration time, and compares the current global time to the expiration time. If the expiration time is earlier than the current global time, then the digital data stored in the media storage device remains valid. While valid, the media storage device is able to retrieve and transmit the digital data for viewing. This process is repeated for each subsequent time interval. Once the expiration time elapses, the media storage device invalidates the digital data.

Abstract: The present invention generally relates to synchronization of isochronous data. More specifically, the present invention relates to method and system for synchronizing isochronous data on transmit over IEEE 1394 bus from content unaware devices. In an exemplary embodiment, the system includes an isochronous data processor (IDP) which is controlled by a firmware control. The IDP receives data packets from a device and inserts a data marker at the beginning of each packet. Each data marker and the associated packet are then stored onto a hard disk. When data are retrieved from the hard disk, the IDP uses the data markers to synchronize data delivery to a requesting device so that data delivery is started on a packet which represents the start of a frame. In the event that a packet within the data stream is corrupted, the IDP also uses the data markers to re-synchronize data delivery so that data delivery is re-initiated on a packet which represents the start of the next frame.

Abstract: A system and method for multi-level context switching in an electronic network comprises a control state machine configured to implement a data priority scheme, a return address generator configured to hold and release return addresses for interrupted instruction modules in accordance with the data priority scheme and context information from the electronic network, and a processor configured to process data from the electronic network in accordance with the data priority scheme and the context information. Receive registers stores data received from the electronic network. The control state machine includes a switch address generator and a program counter select. The switch address generator outputs a switch address, which is an address for a first instruction for a selected-context instruction module. The return address generator holds and releases the return addresses, which are addresses of next consecutive instructions, when an instruction module is interrupted for a context switch.

Abstract: In the method and apparatus of the present invention, an editing system and method is provides that is sophisticated in features but easy to use. In one embodiment, the system includes multiple input sources, such as tape and live sources, at least one output recording device, at least one monitor, and a editing controller, such as a general purpose computer, which controls the input and output device. The controller further provides an innovative graphical user interface that intersperses video from the input devices along with control functions which the user can select using a mouse, keyboard or other input device.

Abstract: An apparatus and process for providing an automated edit procedure between film and video formats is provided wherein a video edit becomes within one video field the exact replica of a film edit. Film frames (1/24th of a second) are read by video scans (1st and 2nd fields in 1/30th of a second) in a 3:2 pull down wherein successive movie frame scans are provided with four classes of video scans. These classes of video scans include (Class A) odd/even scans; (Class B) odd/even/odd scans; (Class C) even/odd/scans; and, finally (Class D) even/odd/even scans. All edits are limited to film frame edits. Each time a film frame edit is converted to a video edit decision, the system looks at the edit out frame type and/or the edit in frame type and the cumulative current overall time differential between the video run time and the film run time for the edit. Frames are added or subtracted to keep the total error within + or - one field and a new cumulative error calculated for the next sequential edit.