- Extension
- .g4
- .dbk
- Format
- Binary
- Binary
- Category
- Fax
- Backup
- Developer
- Computer Fax Systems (CFS)
- Sony Ericsson
- Description
- Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.
- Mobile phone backup file created by Sony Ericsson PC Suite, a program used to manage Sony Ericsson mobile phones; stores phone information, such as contacts, in a compressed format.
- MIME Type
- image/g4fax
- application/x-sonyericsson-dbk
