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Image MIME Reference
DECE-Graphic

Digital Entertainment Content Ecosystem (DECE) Graphic

image/vnd.dece.graphic
VS

Portable Bitmap

image/x-portable-bitmap
PBM

A complete technical comparison of Digital Entertainment Content Ecosystem (DECE) Graphic and Portable Bitmap — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature DECE-Graphic PBM
Transparency (Alpha) Yes ✕ No
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support ✕ No ✕ No
EXIF Metadata ✕ No ✕ No
ICC Color Profile ✕ No ✕ No
Digital Entertainment Content Ecosystem (DECE) Graphic
image/vnd.dece.graphic
Extension
.jpg.png.uvi
Container Standard JPEG/PNG within DECE CFF structures
Compression Lossy (JPEG) / Lossless (PNG)
Algorithm
DCT (JPEG)DEFLATE (PNG)
Color Depth 8-bit (RGB), 24-bit (RGB)
Developed by Digital Entertainment Content Ecosystem (DECE) LLC
Released 2011
Magic Bytes
FF D8 FF (If JPEG) / 89 50 4E 47 (If PNG)
Full DECE-Graphic reference →
Portable Bitmap
image/x-portable-bitmap
Extension
.pbm
Container Netpbm
Compression Uncompressed
Algorithm
None
Color Depth 1-bit (Monochrome)
Developed by Jef Poskanzer (Netpbm Project)
Released 1988
Magic Bytes
50 31 (ASCII) or 50 34 (Binary)
Full PBM reference →

Browser Support Comparison

Browser DECE-Graphic PBM
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
DECE-Graphic

DECE-Graphic Strengths

  • Allowed the UltraViolet DRM ecosystem to easily distinguish structural UI/cover graphic assets from actual encrypted video tracks in a Common File Format container
Limitations
  • Completely obsolete since the 2019 shutdown of UltraViolet
  • Unnecessary abstraction, as the underlying files were just standard JPEGs or PNGs
  • Causes modern strict MIME-type validators to fail if they rely on the Content-Type header
PBM

PBM Strengths

  • Absolute structural simplicity allows parsers to be written from scratch with just a few lines of code
  • ASCII encoding allows manual editing and debugging directly within a standard text editor
  • Serves as a flawless, lossless intermediary for 1-bit raster data like scanned documents or barcodes
Limitations
  • Strictly limited to 1-bit monochrome images; cannot natively display shades of gray or color
  • Lack of compression results in extremely large file sizes, particularly when using the ASCII 'P1' encoding
  • No support for alpha transparency or modern metadata standards like EXIF

When to choose which format

DECE-Graphic
Use DECE-Graphic when…
  • UltraViolet Movie Cover Art
  • Common File Format (CFF) Asset Manifests
  • Legacy DRM Ecosystems
PBM
Use PBM when…
  • Optical Character Recognition (OCR) Pre-processing
  • Unix/Linux Command-Line Image Pipelines
  • Academic Image Processing Teaching

More comparisons

DECE-Graphic vs ACES → PBM vs ACES → DECE-Graphic vs APNG → PBM vs APNG → DECE-Graphic vs AVCI → PBM vs AVCI → DECE-Graphic vs AVCS → PBM vs AVCS → DECE-Graphic vs AVIF → PBM vs AVIF → All comparisons →
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