Cloud DVR (digital video recording, digital video)

Cloud services of a digital video (digital video recording, DVR) can be used by users for the postponed viewing a TV content:

• suspension (pause) of direct TV-broadcasting
• remote scheduling / management of DVR
• the postponed reproduction of complete broadcasting
• demonstration of the current broadcasting since the beginning
• cloud digital video

According to "The evident index of development of network technologies" (Cisco Visual Networking Index,^[1]), by 2019 the postponed viewing TV will become the most fast-growing service in the residential sector. Besides, unlimited amount of memory in a cloud, impossible pleased most of consumers when using traditional video recorders. During the mentioned poll more than 50% of subscribers of paid TV in the USA called unlimited memory "very attractive".

Besides, cloud services are capable to provide to providers of paid TV considerable operational advantages. Passing from the service tied to opportunities of the home equipment to the service managed from a cloud, the operator will be able to transmit a signal to several screens, and neither local data warehouses, nor the expensive equipment for this purpose will be required — service will be available practically on any consumer device with support of video.

Not less important and the fact that the operator will be able flexibly to expand the offers, increasing the range of cloud DVR services, but not the nomenclature of the user devices. Among additional benefits — simplification of operations on setup of video services and management of them and also cost reduction as a result of use of the same virtualized video resources for such services as direct transmission, video on demand, time shift (Time-Shift) and a cloud video (Cloud DVR).

The main objective of the first cloud services of a video and the postponed reproduction of TV-broadcastings was to provide flexible functions of record and storage which cannot be implemented in the architecture tied to home Set-top boxes. At the same time transfer of functions of scheduling of content and management of record in a cloud and also providing to individual users an opportunity to write and reproduce content on different, not only home devices, introduces absolutely new level of complexity.

Transfer of traditional DVR functions from a prefix in a cloud affects a broad spectrum the politician and the business management systems connected with cloud functions of record, storage and reproduction. If to provide a digital video as the bridge between linear broadcasting and the reproduction demanded by users on demand, then functions of a cloud video will be located on both sides of this bridge.

The combination of an intellectual and dynamic management system for politicians to elastic infrastructure of processing of video in a cloud allows to implement unlimited flexibility of a cloud video. Such combination gives the chance:

• it is better to control content, determining parameters of duration of archive storage of records and devices, it is authorized to them to reproduce records;
• provide complete record of programs using metadata and relevant updates of the schedule of broadcastings (it is a vital issue for traditional DVR services which will not recognize such changes in the schedule as, for example, increase in duration of sports broadcastings);
• optimize memory for storage of the unique records and records of repeated reproduction with the help the politician helping to delete duplicative records and advertizing and also to redistribute the requested records for reproduction;
• it is intellectual to cache the written content in network or using prefixes taking into account popularity and loading of network;
• increase personalisation level, offering the services allowing users to find preferable content, including a possibility of forecast record of content.

Notes