ANSI SCTE 247:2018 pdf free download – High Dynamic Range (HDR) Video: System Requirements for Cable Phase 1 – Initial Deployment
The consensus of the drafting group members is that HDR10 is appropriate for use in the cable industry for a “first pass” HDR video distribution option against the time constraints larger operators desire to meet. Other existing HDR formats used for content or advertising production have appropriately defined conversion methods that allow other options to be used but translated for cable distribution. HDR10 is used by both Blu-ray and Internet streaming providers, which ensures the availability of high-quality content in the format and the availability of technical systems products that will meet the needs of the cable industry. HDR10 processing and display is supported across the widest variety of currently available and next-generation television, computer, tablet, and phone devices. Its performance many be improved in the future with the optional inclusion of dynamic metadata, as the ability to create and deliver it becomes a practical possibility in the content production and distribution ecosystem. SCTE should proceed expeditiously to document HDR10 for cable systems to address initial industry launch demands while continuing work to consider other HDR options for use in cable where appropriate. The HLG HDR system, which operates simply without HDR metadata of any kind to complicate the various cable system workflow and processing systems, is also a potentially valid solution to some of the issues identified in this document, and should be evaluated along with other HDR systems and metadata based enhancements to HDR10 in future phases of HDR standardization.
6.1. Video System Discussion
As noted in the Background section of this document, the end-to-end nature of video services necessitates that some latitude be afforded to the description of how this SCTE document fits within the scope of other SDO work. High dynamic range video shall be considered in the context of modern cable systems, in which cable operators deliver a variety of video services (e.g., live linear channels and on-demand content) to a variety of consumer devices (e.g., cable STBs, smart TVs, PCs, tablets and smart phones) over different network infrastructures (e.g., the cable hybrid fiber-coax (HFC) plant, in-home DOCSIS/WiFi IP delivery and external internet connections such as wireless carriers’ 4G networks). In addition, DVR, “cloud DVR” and “start-over viewing” add complexity and technical requirements to the not-so-simple case of live linear channels. The result is that modern cable systems must support many different, highly complex paths in which content must flow among various subsystems with cable operators’ plant. Moreover, cable operators exist in the middle of an entire end-to-end ecosystem in which many aspects of content production and consumer devices are beyond their control, but which impose certain technology constraints and limitations. In order to develop the requirements contained in this document, SCTE DVS scrutinized both live linear channels and on-demand content delivery on an end-to-end basis – from content production through various stages of delivery all the way to the consumer display. It is clear that the requirements for Next-generation cable systems need to take into account many important complexities and differences from the far simpler situation of purely on-demand delivery of pre-recorded content; and yet next- generation cable systems must provide a competitive viewing experience.