Patent ID: 7747700
Filing Date: 2010-06-29
Classification: G11B

Abstract:
1. A system for previewing and editing audio/video (AV) data, comprising: a first AV server storing AV data and having a recording means; a second AV server storing compressed AV data, the compressed AV data containing content corresponding to the AV data stored on the first AV server; a plurality of edit terminals for selecting AV data from the first AV server, previewing compressed AV data from the second server that corresponds to the selected AV data, identifying a portion of the AV data in the first server corresponding to a portion of the previewed compressed AV data, and editing the portion of identified AV data from the first server; a recording apparatus connected to the plurality of edit terminals for storing AV data from the first AV server, wherein the plurality of edit terminals access the recording apparatus at higher access speeds than the access speeds at which the plurality of edit terminals can access the recording means on the first AV server, wherein each of the plurality of edit terminals includes a first processing means, a second processing means, and a third processing means; the first processing means for previewing compressed AV data corresponding to the AV data selected from the first AV server; the second processing means for sending a transfer request to transfer the identified portion of the AV data from the first AV server to the recording apparatus; and the third processing means for previewing and editing the identified portion of AV data from the first AV server that is being stored at the recording apparatus; a first control means for causing the recording apparatus to instantiate a file which is empty and contains a sparse area of the same size as the data size of a designated AV data, the designated AV data being AV data stored in the first AV server that has been edited by at least one of the plurality of edit terminals; a second control means for causing the first AV server to reproduce the designated AV data and to transmit the designated AV data to the recording apparatus, wherein the second control means further causes the first AV server to temporarily stop reproducing the designated AV data in response to a signal from the recording apparatus that no free area exists in the recording apparatus, and to resume reproducing the designated AV data in response to a signal indicating that free area exists in the recording apparatus; a third control means for causing the recording apparatus to write the designated AV data transmitted from the first AV server into the file, and wherein the third control means temporarily stops writing in response to a signal indicating that no free area exists in the recording apparatus, and to resume writing in response to a signal indicating that free area exists in the recording apparatus; and a fourth control means for causing the recording apparatus to make a sparse area in the file, based on an edit made by at least one the plurality of edit terminals; wherein the second control means controls the first AV server to reproduce the designated AV data that should be written into the accessed portion of the file in the recording apparatus on a priority basis based on the accessing of the sparse area in the file by the plurality of edit terminals, and wherein the third control means controls the recording apparatus to write the designated AV data into the accessed portion of the file in the recording apparatus on a priority basis based on the fact that a portion of the sparse area in the file was accessed by the plurality of edit terminals.