Free webp to jpg
EN
Image MIME Reference
DVB-SUB

DVB Subtitle

image/vnd.dvb.subtitle
VS

PaintShop Pro Image

image/x-paintshoppro
PaintShop-Pro-PSP

A complete technical comparison of DVB Subtitle and PaintShop Pro Image — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature DVB-SUB PaintShop-Pro-PSP
Transparency (Alpha) Yes Yes
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support ✕ No Yes
EXIF Metadata ✕ No Yes
ICC Color Profile ✕ No Yes
DVB Subtitle
image/vnd.dvb.subtitle
Extension
.sub.sup.ts
Container MPEG-2 Transport Stream (MPEG-TS) PES Packets
Compression Lossless (Run-Length Encoding)
Algorithm
RLE (Run-Length Encoding)
Color Depth 2-bit (Indexed), 4-bit (Indexed), 8-bit (Indexed CLUT)
Developed by DVB Project (ETSI)
Released 1997
Magic Bytes
20
Full DVB-SUB reference →
PaintShop Pro Image
image/x-paintshoppro
Extension
.psp.pspimage.tub.pat
Container PSP Chunk-based Format
Compression Uncompressed / RLE (Run-Length Encoding) / LZ77
Algorithm
RLELZ77
Color Depth 8-bit (Indexed), 16-bit (Grayscale), 24-bit (RGB), 32-bit (RGBA), 48-bit (High Color)
Developed by Jasc Software / Corel Corporation (Alludo)
Released 1990
Magic Bytes
7E 42 4B 00
Full PaintShop-Pro-PSP reference →

Browser Support Comparison

Browser DVB-SUB PaintShop-Pro-PSP
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
DVB-SUB

DVB-SUB Strengths

  • Guarantees 100% accurate visual representation (fonts, colors, layouts) exactly as intended by the broadcaster
  • Effortlessly supports complex character sets (e.g., Arabic, Asian languages) without relying on the client device possessing the necessary fonts
  • Supports region-specific dynamic positioning to avoid obscuring important on-screen graphics or burned-in lower thirds
Limitations
  • Requires significantly more bandwidth than text-based subtitles
  • Inaccessible to screen readers and cannot be indexed by search engines
  • Requires OCR (Optical Character Recognition) to translate back into standard text-based web formats
  • Zero native support in HTML5 video elements
PaintShop-Pro-PSP

PaintShop-Pro-PSP Strengths

  • Provides robust, non-destructive editing capabilities with full support for vector layers, adjustment layers, and layer blend modes
  • Historically offered a highly capable and affordable alternative to Adobe Photoshop's PSD format for Windows users
  • Features proprietary support for 'Picture Tubes' (.tub), a unique brush technology that paints sequential or random raster objects along a path
Limitations
  • Deeply proprietary format tied exclusively to the Corel/Alludo ecosystem
  • Third-party software support (like GIMP or ImageMagick) is often limited to parsing older .psp files, frequently failing to render complex layers in modern .pspimage files
  • No support in modern web browsers; must be exported to a flattened web format (JPEG/PNG) for online viewing

When to choose which format

DVB-SUB
Use DVB-SUB when…
  • Digital Television Broadcasts (DVB-T, DVB-S, DVB-C)
  • IPTV and OTT Streaming
  • Hardware Set-top Boxes
PaintShop-Pro-PSP
Use PaintShop-Pro-PSP when…
  • PaintShop Pro Multi-layer Project Archival
  • Digital Art and Photo Retouching
  • Picture Tubes (.tub) and Custom Patterns (.pat)

More comparisons

DVB-SUB vs ACES → PaintShop-Pro-PSP vs ACES → DVB-SUB vs APNG → PaintShop-Pro-PSP vs APNG → DVB-SUB vs AVCI → PaintShop-Pro-PSP vs AVCI → DVB-SUB vs AVCS → PaintShop-Pro-PSP vs AVCS → DVB-SUB vs AVIF → PaintShop-Pro-PSP vs AVIF → All comparisons →
Share this comparison