公开(公告)号：JPH1070718A

公开(公告)日：1998-03-10

申请号：JP14631697

申请日：1997-06-04

Applicant: IBM

Inventor： MURRAY CHRISTOPHER S

IPC: H04N5/92 ,  H04N7/173 ,  H04N7/24 ,  H04N7/26

Abstract: PROBLEM TO BE SOLVED: To provide the method which can transmit digital video segments over transmission channels while varying the transmission rate during the transmission. SOLUTION: For the respective transmission channels, the video data segments accompanied by write control blocks(WCB) are stored in a data buffer 40. Each WCB includes a pointer indicating its relative video data segment and a code indicating a preferable data transmission rate. The address of the WCB is stored in the FIFO buffer 50 for its transmission channel. When the code information of the WCB indicates the need to change the speed, an execution-time subroutine executed by a coprocessor sets a bit for the channel control word of each WCB and stops a DMA process when the corresponding video segment is transmitted to initiate an interruption. An interruption handler decides a new line speed and a variable-speed clock is set according to it.

公开(公告)号：DE69739710D1

公开(公告)日：2010-02-04

申请号：DE69739710

申请日：1997-05-23

Applicant: IBM

Inventor： MURRAY CHRISTOPHER S

IPC: H04N5/92 ,  H04N7/173 ,  H04N7/24 ,  H04N7/26

Abstract: A method is provided for allowing the transmission of digital video segments along a number of transmission channels, with the line speed, or rate of transmission in bits per second, being variable during a transmission. For each transmission channel, video data segments are stored in a data buffer, along with data segments known as Write Control Blocks (WCBs). Each WCB includes a pointer to the video data segment with which it is associated and a line speed code indicating the preferred rate of data transmission. The addresses of the WCBs are stored in a FIFO buffer which is established for each transmission channel. When coded information within a WCS indicates that a speed change is needed, a run-time subroutine executing in a co-processor sets bits within a channel control word forming a portion of each WCB to stop a DMA process and to issue an interrupt when the corresponding video segment is to be transmitted. An interrupt handler determines the new line speed and sets a variable speed clock accordingly.

公开(公告)号：CA2154042A1

公开(公告)日：1996-03-09

申请号：CA2154042

申请日：1995-07-17

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSELL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S ,  OLNOWICH HOWARD T ,  SAXENA ASHOK RAJ ,  SCHUBERT KARL DAVID ,  STANSBURY BUDDY FLOYD

IPC: H04N5/93 ,  H04H20/42 ,  H04N5/765 ,  H04N7/173 ,  H04N21/218 ,  H04N21/226 ,  H04N21/238 ,  H04N21/262

Abstract: A media streamer includes at least one storage node for storing a digital representation of a video presentation. The video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks, each data block storing data corresponding approximately to a T/N period of the video presentation. The media streamer further includes a plurality of communication nodes each having at least one input port and at least one output port; a circuit switch connectedbetween the at least one storage node and input ports of the plurality of communication nodes, the circuit switch selectively coupling one or more of the input ports to the at least one storage node to enable the digital representation stored thereat to appear at one or more of the output ports; and at least one control node coupled at least to the plurality of communication nodes and to the at least onestorage node for enabling any one of the N blocks to appear at any output port of any of the plurality of communication nodes.

公开(公告)号：DE69516346T2

公开(公告)日：2000-10-19

申请号：DE69516346

申请日：1995-08-25

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSELL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S ,  OLNOWICH HOWARD T ,  SAXENA ASHOK RAJ ,  SCHUBERT KARL DAVID ,  STANSBURY BUDDY FLOYD

IPC: H04N5/93 ,  H04H20/42 ,  H04N5/765 ,  H04N7/173 ,  H04N21/218 ,  H04N21/226 ,  H04N21/238 ,  H04N21/262

Abstract: A media streamer (10) includes at least one storage node (16, 17) for storing a digital representation of a video presentation. The video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks, each data block storing data corresponding approximately to a T/N period of the video presentation. The media streamer further includes a plurality of communication nodes (14) each having at least one input port and at least one output port; a circuit switch (18) connected between the at least one storage node and input ports of the plurality of communication nodes, the circuit switch selectively coupling one or more of the input ports to the at least one storage node to enable the digital representation stored thereat to appear at one or more of the output ports; and at least one control node (18) coupled at least to the plurality of communication nodes and to the at least one storage node for enabling any one of the N blocks to appear at any output port of any of the plurality of communication nodes.

公开(公告)号：ES2144579T3

公开(公告)日：2000-06-16

申请号：ES95305964

申请日：1995-08-25

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSELL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S

IPC: H04N5/93 ,  H04H20/42 ,  H04N5/765 ,  H04N7/173 ,  H04N21/218 ,  H04N21/226 ,  H04N21/238 ,  H04N21/262

Abstract: A media streamer (10) includes at least one storage node (16, 17) for storing a digital representation of a video presentation. The video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks, each data block storing data corresponding approximately to a T/N period of the video presentation. The media streamer further includes a plurality of communication nodes (14) each having at least one input port and at least one output port; a circuit switch (18) connected between the at least one storage node and input ports of the plurality of communication nodes, the circuit switch selectively coupling one or more of the input ports to the at least one storage node to enable the digital representation stored thereat to appear at one or more of the output ports; and at least one control node (18) coupled at least to the plurality of communication nodes and to the at least one storage node for enabling any one of the N blocks to appear at any output port of any of the plurality of communication nodes.

公开(公告)号：BR9503820A

公开(公告)日：1996-09-10

申请号：BR9503820

申请日：1995-08-28

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSEL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S

IPC: H04N5/76

公开(公告)号：DE69516346D1

公开(公告)日：2000-05-25

申请号：DE69516346

申请日：1995-08-25

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSELL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S ,  OLNOWICH HOWARD T ,  SAXENA ASHOK RAJ ,  SCHUBERT KARL DAVID ,  STANSBURY BUDDY FLOYD

IPC: H04N5/93 ,  H04H20/42 ,  H04N5/765 ,  H04N7/173 ,  H04N21/218 ,  H04N21/226 ,  H04N21/238 ,  H04N21/262

Abstract: A media streamer (10) includes at least one storage node (16, 17) for storing a digital representation of a video presentation. The video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks, each data block storing data corresponding approximately to a T/N period of the video presentation. The media streamer further includes a plurality of communication nodes (14) each having at least one input port and at least one output port; a circuit switch (18) connected between the at least one storage node and input ports of the plurality of communication nodes, the circuit switch selectively coupling one or more of the input ports to the at least one storage node to enable the digital representation stored thereat to appear at one or more of the output ports; and at least one control node (18) coupled at least to the plurality of communication nodes and to the at least one storage node for enabling any one of the N blocks to appear at any output port of any of the plurality of communication nodes.

公开(公告)号：AT192007T

公开(公告)日：2000-05-15

申请号：AT95305964

申请日：1995-08-25

Applicant: IBM

Inventor： BELKNAP WILLIAM RUSSELL ,  CLEARY LOUISE IRENE ,  ELDRIDGE JAMES W ,  FITCHETT LARRY WILLIAM ,  LUNING STEPHEN G ,  MURRAY CHRISTOPHER S ,  OLNOWICH HOWARD T ,  SAXENA ASHOK RAJ ,  SCHUBERT KARL DAVID ,  STANSBURY BUDDY FLOYD

IPC: H04N5/93 ,  H04H20/42 ,  H04N5/765 ,  H04N7/173 ,  H04N21/218 ,  H04N21/226 ,  H04N21/238 ,  H04N21/262

Abstract: A media streamer (10) includes at least one storage node (16, 17) for storing a digital representation of a video presentation. The video presentation requires a time T to present in its entirety, and is stored as a plurality of N data blocks, each data block storing data corresponding approximately to a T/N period of the video presentation. The media streamer further includes a plurality of communication nodes (14) each having at least one input port and at least one output port; a circuit switch (18) connected between the at least one storage node and input ports of the plurality of communication nodes, the circuit switch selectively coupling one or more of the input ports to the at least one storage node to enable the digital representation stored thereat to appear at one or more of the output ports; and at least one control node (18) coupled at least to the plurality of communication nodes and to the at least one storage node for enabling any one of the N blocks to appear at any output port of any of the plurality of communication nodes.