Sony Corporation

Sony Electronics Inc

Other

Richard A Bardini

Scott D Smyers

Bruce Alan Fairman

Glen David Stone

Jose L Diaz

Jung-Jen Liu

Steve Pham

Michael Alan Kutner

Oliver F Morgan

Douglas Koji Tao

Adelheid Maria Schoolcraft

Samuel R Shore

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.

Method of flow control for data transported using isochronous packets over an IEEE 1394-2000 serial bus network

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. The stream of non real-time isochronous data packets is transmitted from the source device via the source plug to the destination device via the destination plug.

Method for any speed dubbing using isochronous packets on isochronous channels or on asynchronous streams over an IEEE 1394-2000 serial bus network

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.

Method and system for synchronizing isochronous data on transmit over the IEEE 1394 bus from content unaware devices

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. The program counter select outputs a switch address, a return address, or a next consecutive address to select the appropriate instruction in the memory for execution by the processor.

System and method for multi-level context switching in an electronic network

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. The program counter select outputs the switch address, the return address, or a next consecutive address to select the appropriate instruction in the memory for execution by the processor.

System and method for context switching in an electronic network

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.

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Los Gatos, CA, United States of America

Richard A Bardini