1. Introduction

この節では APV の RFC テキストを保持し, bitstream syntax, syntax element processing, decoding and parsing processes, metadata, profiles, levels, bands, raw bitstream format, implementation references を扱う.

RFC 原文

1.  Introduction

   This document defines the bitstream format and decoding process for
   the Advanced Professional Video (APV) codec.  The APV codec is a
   professional video codec that was developed in response to the need
   for professional-level, high-quality video recording and post
   production.  The primary purpose of the APV codec is for use in
   professional video recording and editing workflows for various types
   of content.  This specification is neither the product of the IETF
   nor a consensus view of the community.

   The APV codec supports the following features:

   *  Perceptually lossless video quality that is close to the original,
      uncompressed quality;

   *  Low complexity and high throughput intra frame only coding without
      inter frame coding;

   *  Intra frame coding without prediction between pixel values but
      with prediction between transformed values for low delay encoding;

   *  High bit rates of up to a few Gbps for 2K, 4K, and 8K resolution
      content, enabled by a lightweight entropy coding scheme;

   *  Frame tiling for immersive content and for enabling parallel
      encoding and decoding;

   *  Various chroma sampling formats from 4:0:0 to 4:4:4:4, and bit
      depths from 10 to 16 (Note: Only the profiles supporting 10 bits
      and 12 bits are currently defined);

   *  The ability to decode and re-encode multiple times without severe
      visual quality degradation; and

   *  Various metadata including HDR10/10+ and user-defined formats.