In professional video production, users have to access to huge multimedia files simultaneously in an error-free environment, this restriction force the use of expensive disk architectures for video servers. Previous researches proposed different RAID systems for each specific task (ingest, editing, file, play-out, etc.). Video production companies have to acquire different servers with different RAIDs systems in order to support each task in the production workflow. The solution has multiples disadvantages; duplicated material in several RAIDs, duplicated material for different qualities, transfer and transcoding processes, etc.The basic idea of the proposed method is to allow errors in the video file, the method proposed for storage the JPEG2000 images consists in spreading the data in several disk RAID's to adapt the significance of the data in the final image quality with the storage type, the part of data that provide more psnr to the final quality have to be more protected than another. Thus if there are disk failure in a disc RAD, we only lose the quality associated to that part of video, but we can play the clip with the "best effort" quality. In a classical storage, if we have errors in a file, we can't use the file in real time and it is necessary to recover the damage parts. With this approach we show the image under the philosophy: "the most important is to see the image" with the highest possible quality.The architecture is based in a scalable storage; scalable video means a video which is coded in such a way that subsets of the full video bit stream can be decoded to create scalable low quality/resolution videos. In this method the most important data (the lowest resolution data) have to be stored in the most protected RAID, with this philosophy we don't need to protect all the huge file with the same redundancy, only the high relevance data and not the low. This approach allows having a central storage without duplicate material at different bitrates, each video quality is supported by the previous one and there isn't duplicated material.With this architecture, an economical method for storage of multimedia professional content applied to JPEG2000 files has been formulated. This method uses several types of RAID configuration and the video file data is decomposed into different files in order to correlate the redundancy with importance of the data. The global storage can be used in all the different tasks of the production workflow saving disk space, redundant files and transfers procedures.This method opens a wide range of future work:• A new architecture of video servers.• Investigation of areas which are really necessary in each one of the headers to reduce as much as possible the file to be stored as main.• Implementation of an HW model which speeds up separation and union of files.• Application of the method to other types of files and code systems.
In sporting event transmissions of international significance, broadcasting in each country is carried out by the owner of the rights for that particular country. The output signal (program signal) in the original production center normally contains the graphic elements presented in the language considered the most international: English. The problem created by this "dirty" signal in the different broadcasters is double: On one hand, title adaptation produces the superposition of different graphics on a same image. On the other hand, those titles will remain in the channel's historical files. In order to solve the previous problem, different options are presently being taken, which involve increased program production costs. This is also aggravated by the introduction of high definition production. In this article, an inexpensive solution is proposed for the adaptation of these titles to each country. This solution is based on the use of the distribution and video production current infrastructure, for titling in the channel's natural language. In this manner we offer the audiences a more competitive product, without cost increase involved.
Professional processes for creation and manipulation audiovisual content, require a great volume of information which must be lightly compressed for its processing and accessible by a huge number of users. In spite of this compression, the resulting files are usually of a considerable size and they require a special treatment. The method proposed for storage of JPEG2000 images consists in dividing the file into two parts, "key" and "support" files, reliable and unreliable storage respectively. The key file will contain at least the different boxes of the contiguous Code-Stream box with its contents and the headers of each one of the contiguous Code-Stream box together with the image material which can be stored depending on transfer speed so that reading of both systems will occur on a parallel. The rest of the data will be stored in the support file.Key file is stored in RAID5 which provides reliability as well as increasing transfer, and the support file, considered to be secondary, is stored on RAID0, since what is pursued above all is transfer speed. In order to have more security, other sets of RAIDs can be use (e.g. RAID1 for key file and RAID5 for support file).With Seagate Barracuda, a normal configuration in RAID5 for 180 TB has to use 150 of 2TB disks; with our configuration we use only 93 disks.In this work, an economical method for storage of multimedia professional content applied to JPEG2000 files has been formulated. This method uses two types of RAID configuration to achieve safety in the data which most affect quality and transfer speed in the rest. This method opens a wide range of future work: -A new configuration way for architectures for low demand video servers.-Definition of ideal size for each file.-Investigation of areas which are really necessary in each one of the headers to reduce as much as possible the file to be stored as main.-Implementation of an HW model which speeds up separation and union of files.-Application of the method to other types of files and code systems.
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