VoxelVideo Format
draft-habib-voxelvideo-00
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| Document | Type | Active Internet-Draft (individual) | |
|---|---|---|---|
| Authors | Daniel Habib , Alyssa Joaquin | ||
| Last updated | 2024-09-12 | ||
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| Intended RFC status | (None) | ||
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| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | I-D Exists | |
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draft-habib-voxelvideo-00
WG Working Group D. Habib
Internet-Draft A. Joaquin
Intended status: Standards Track True3D Technologies Inc.
Expires: 10 March 2025 6 September 2024
VoxelVideo Format
draft-habib-voxelvideo-00
Abstract
This document proposes the VoxelVideo format, a file structure
designed specifically for the efficient handling, playback, and
livestreaming of 3D voxel-based videos. The format is intended for
applications in gaming, virtual reality, live sports, and interactive
media, providing a robust framework for managing complex 3D data with
spatial precision and color fidelity. This document describes the
current JSON-based version and outlines future plans to adopt a more
efficent, compressed format.
About This Document
This note is to be removed before publishing as an RFC.
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Source for this draft and an issue tracker can be found at
https://github.com/voxelvideos/voxel-video-file-format.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 3
3. VoxelVideo Format Overview . . . . . . . . . . . . . . . . . 3
4. File Structure and Key Components . . . . . . . . . . . . . . 3
4.1. Version . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.2. Playback Metadata . . . . . . . . . . . . . . . . . . . . 4
4.3. Voxel Dimensions . . . . . . . . . . . . . . . . . . . . 4
4.4. Title . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.5. Blocks Array . . . . . . . . . . . . . . . . . . . . . . 4
5. Frame Types and Future Enhancements . . . . . . . . . . . . . 5
6. Interpretation of the Blocks Array . . . . . . . . . . . . . 5
7. Potential Use Cases . . . . . . . . . . . . . . . . . . . . . 5
8. Future Directions . . . . . . . . . . . . . . . . . . . . . . 6
9. Security Considerations . . . . . . . . . . . . . . . . . . . 6
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
11.1. Normative References . . . . . . . . . . . . . . . . . . 6
11.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
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1. Introduction
The VoxelVideo format addresses the need for an efficient and
scalable method to handle, render, and stream 3D voxel-based videos.
Existing video formats are not optimized for the distinct
characteristics of voxel data, such as spatial precision and color
fidelity in three dimensions. The VoxelVideo format is tailored for
use in applications like gaming, virtual reality, live sports, and
interactive media, where real-time manipulation and playback of
complex 3D content are essential. This document describes the JSON-
based format and outlines future enhancements, including the adoption
of a compressed binary format aimed at improving performance and
reducing file sizes.
2. Conventions and Definitions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
This document uses the following terms:
* *Voxel*: a three-dimensional pixel representing a point in 3D
space with associated attributes such as color [AES].
* *I-frame (Intra-coded frame)*: A self-contained video frame that
fully represents the voxel grid.
* *P-frame (Predicted frame)*: A video frame which contains only
information on the differences from previous frames.
3. VoxelVideo Format Overview
The VoxelVideo format utilizes a JSON-based structure to organize 3D
voxel data, facilitating efficient playback and manipulation. It is
designed to be straightforward to implement, with a focus on clarity
and accessibility in its initial version. Future iterations will
shift towards a compressed binary format to enhance scalability and
performance.
4. File Structure and Key Components
The current structure of the VoxelVideo is as follows:
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export default interface VoxelVideoData {
Version: number; // Specifies the version of the file format
Framerate: number; // Frames per second
Framecount: number; // Total number of frames
Duration: number; // Total duration of the video in seconds
Dimensions: { // Dimensions of the voxel matrix
x: number; // Width in voxels
y: number; // Height in voxels
z: number; // Depth in voxels
};
Title: string; // Title of the video
Blocks: (string | null)[][]; // 3D array representing the voxel grid
}
4.1. Version
The Version field ensures compatibility across different iterations
of the format.
4.2. Playback Metadata
Metadata fields like Framerate, Framecount, and Duration provide
essential information for correct playback of the video content.
4.3. Voxel Dimensions
Dimensions defines the size of the voxel space, specifying the width,
height, and depth necessary for rendering.
4.4. Title
The Title field serves to identify the content of the video, for
easier cataloging and retrieval.
4.5. Blocks Array
The Blocks array represents the 3D voxel grid as a nested array,
where each inner array corresponds to a frame of the video. Within
each frame, the arrays represent slices of the voxel space at varying
depths, providing a structured representation of the 3D voxel data
across the entire frame.
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5. Frame Types and Future Enhancements
Currently, the VoxelVideo format utilizes I-frames, where each frame
is a complete voxel grid independent of other frames. Future
versions will include P-frames, which will encode changes between
frames to reduce file size and improve streaming efficiency in 3D
environments.
6. Interpretation of the Blocks Array
To interpret the Blocks array, read the voxel grid plane by plane,
starting at the top-left corner of the first plane (height 0),
proceeding row by row from left to right. After completing all rows
of a plane, move up to the next plane and repeat the process until
all planes are read.
7. Potential Use Cases
The VoxelVideo format is suitable for scenarios requiring real-time
interaction and manipulation of 3D video content. Use cases include
immersive virtual reality environments where live 3D voxel video
streaming can deliver spatially precise and dynamic visual data. The
format is also applicable in education simulations that require high-
fidelity 3D visualizations for teaching concepts in fields such as
medicine, engineering, and environmental science. Interactive gaming
environments can utilize the VoxelVideo format to represent 3D voxel
data, allowing for the creation of fully manipulable virtual worlds
that support complex interactions within the game environment.
In additon, the VoxelVideo format may be used in live sports
broadcasting to generate 3D replays and visualizations, enabling
viewers to observe events from various perspectives and analyze the
content interactively. This capability can provide additional
insights beyond traditional 2D video formats.
The VoxelVideo format supports livestreaming using Dynamic Adaptive
Streaming over HTTP (DASH), similar to its application for 2D videos.
This approach allows for efficient and scalable delivery of 3D voxel
video content across various devices and network conditions by
segmenting videos into smaller parts and encoding each segment at
different quality levels.
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8. Future Directions
The current version of the VoxelVideo format (version 0.0), utilizes
a JSON-based structure designed for simplicity and ease of use,
facilitating initial development and experimentation. Future
iterations will focus on enhancing performance and scalability by
transitioning to a compressed binary format, aiming to reduce file
sizes and improve data storage and retrieval efficiency.
Additionally, future versions will explore the implementation of
P-frames to encode changes between frames, further optimizing file
size and playback performance. These enhancements are intended to
expand the format's capabilities, providing a more robust solution
for managing and delivering 3D voxel-based video content at scale.
9. Security Considerations
This document does not specifically address security considerations.
It is important for implementers of the VoxelVideo format to consider
the potential security implications associated with processing
untrusted voxel data. Implementers should account for the worst-case
scenarios in terms of computational complexity, memory usage, and
required processing resources when handling voxel data, especially in
contexts like livestreaming where inputs may be dynamic and
unverified.
10. IANA Considerations
This document has no IANA actions.
11. References
11.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/rfc/rfc2119>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.
11.2. Informative References
[AES] Shchurova, C. I., "A methodology to design a 3D graphic
editor for micro-modeling of fiber-reinforced composite
parts", Journal Advances in Engineering Software, Volume
90, December 2015, Pages 76-82, 2015.
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Authors' Addresses
Daniel Habib
True3D Technologies Inc.
15 Morris Ave
Apt. 307
Long Branch, NJ, 07740
United States of America
Phone: +1 908 812 8365
Email: daniel@quickvid.ai
Alyssa Joaquin
True3D Technologies Inc.
Email: alyssa.joaquin@gmail.com
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