ISO/IEC TR 23002-9:2024 情報技術 — MPEG ビデオ技術 — 第 9 部:ビデオアプリケーション向けフィルムグレイン合成技術 | ページ 2

Foreword

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This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information, in collaboration with ITU-T (as ITU-T twin H.Sup-FGST).

A list of all parts in the ISO/IEC 23002 series can be found on the ISO and IEC websites.

Introduction

Film grain synthesis technology can provide subjective quality benefits for certain video applications and can be used to effectively achieve improved video compression. The use of such technology can involve pre-processing to reduce film grain and sensor noise that is present in a video or image signal prior to compression. Metadata information can then be conveyed to a decoder and used to synthesize noise with similar characteristics as in the original content as a post-processing stage that follows the compression decoding process. This metadata can be signalled using appropriate mechanisms, such as the supplemental enhancement information messages that are supported by several video coding standards.

This document provides a referenceable overview of the end-to-end processing steps for film grain and sensor noise removal, estimation, parameterization, synthesis, and blending for consumer distribution applications. This document includes examples of encoder-side and post-decoding processing steps for grain blending for some of the currently defined technologies.

1 Scope

This document provides a description of the film grain synthesis technology in video applications, including for use with Rec. ITU-T H.264 | ISO/IEC 14496-10, Rec. ITU-T H.265 | ISO/IEC 23008-2 and Rec. ITU-T H.266 | ISO/IEC 23090-3.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in Rec. ITU-T H.264 | ISO/IEC 14496-10, Rec. ITU-T H.265 | ISO/IEC 23008-2, Rec. ITU-T H.266 | ISO/IEC 23090-3 and Rec. ITU-T H.274 | ISO/IEC 23002-7 apply.

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Bibliography