US 8,285,896 B2Granted

Data conversion system

AssigneeGvbb Holdings S.A.R.L.

InventorAtsushi Tabuchi

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Abstract

A data conversion system for converting data outputted from an information processor into data in a different format in real time while preventing any defect of an image such as frame missing or frame repetition of moving image data by synchronizing data transfer with converted data output. One of first and second nodes on an IEEE1394 bus functions as a cycle master, and first data is transferred from the first node to the second node in synchronism with a cycle start packet outputted from the cycle master. Second data generated by converting the first data by the second node is outputted in synchronism with a reference signal inputted from outside. The system comprises an external synchronizing signal receiving section provided at least in one of the first and second nodes and adapted to receive the reference signal inputted from outside and a synchronism control section for synchronizing the frequency of a cycle start packet outputted from the cycle master with the reference signal received by the external synchronizing signal receiving section.

Claims13

Dependent claims

A video signal conversion system comprising:

a first node and a second node in which one of the first node and the second node on an IEEE1394 bus serves as a cycle master,
the first node having a DV data processing unit configured to transmit first a DV video signal to the second node via the IEEE1394 bus at a transfer rate synchronized with a cycle start packet output from the cycle master,
the second node having a data conversion unit configured to receive the first DV video signal from the DV data processing unit of the first node via the IEEE1394 bus, convert the first DV video signal to a second video signal, and output the second video signal generated by conversion of the first DV video signal in the second node in synchronism with an external reference signal from the second node,
an external synchronizing signal receiver for receiving the external reference signal provided on at least one of the first and second nodes, and
a synchronization adjustment unit for synchronizing a frequency of the cycle start packet output from the cycle master with a frequency of the external reference signal received by the external synchronizing signal receiver, by carrying out feedback control of a clock source frequency of the cycle master using the external reference signal, such that the transfer of the first DV video signal to the second node is synchronized with the output of the second video signal from the second node.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/595,168Filed 19 Sep 2003
Published: US 2007/0046512 A11 Mar 2007
Granted: 9 Oct 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification245 codes

G11B 27/034
Electronic editing of digitised analogue information signals, e.g. audio or video signals: on discs
G01S 1/026
Means for monitoring or calibrating: of associated receivers
G01S 5/021
Details: calibration, monitoring or correction
G01S 5/06
Using radio waves: position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements