106 in an alternative embodiment of the present invention frames adhering to the serial digital interface sdi standard can be utilized as illustrated in fig9 a through 9e in these embodiments bus 104 adheres to the ieee 1394b serial bus protocol to accommodate data rate restrictions set forth by the sdi standard as described above interface 106 forms frames from received input by creating scanned lines performing deinterlacing packetizing and creating fixed size sdti frames of audio and video data various modifications can be made to sdti frames depending on the processing resources available on computer 100 interface 106 client 102 or other device as described above the transmission of sdti frames sent over bus 104 are synchronized to the vertical blanking interval of the accepted signal as shown in fig9 a sdti frame 160 generally has two components vertical blanking portion 162 and horizontal retrace 164 alternatively in another embodiment fig9 b sdi frame header 166 a header having a synchronization bit and a frame count is added to sdti frame 160 for further synchronization and fault detection purposes such as recovering from data lost in transmission or the occurrence of a bus reset in this embodiment a frame count synchronization bit is included in sdti frame header 166 and sdti frame header 166 is synchronized with vertical blanking portion 162 for example in an application where interface 106 is unable to read compressed data or excessive upgrades to interface 106 would be required sdti frame 160 can be transmitted to computer 100 where processing on the sdti stream is performed by software in a non realtime manner alternatively as shown in fig9 c sdti frame 160 can be constructed without horizontal retrace 164 to further reduce processing overhead an.