Hitachi NDR recorder can work with three different video compression methods, H.264 (AVC), MPEG-4, and JPEG. It allows configuring any system with a large capacity HDD that makes full use of these methods.
NDR (the recorder used with network cameras) is the most different from DVR (the recorder used with conventional cameras) in that its signal processing fully depends on digital technologies from recording to reproducing, which enables NDR to provide high-quality images.
The storage capacity per frame of JPEG compressed images depends on both the image size and the compression ratio. The compression ratio is selectable in 10 levels. (Note that the following table shows the typical capacities. Each capacity varies between different subjects.)
| Storage Capacities per Frame for Different Image Sizes and Compression Ratios (KP-IP1100/IP100/IP110, PT-IP100T) |
|||
|---|---|---|---|
| 640×480 | 640×240 | 320×240 | |
| 1 (High ratio) | 13KB | 8KB | 5KB |
| 2 | 15KB | 10KB | 6KB |
| 3 | 17KB | 13KB | 7KB |
| 4 | 20KB | 15KB | 9KB |
| 5 (Standard ratio) | 23KB | 18KB | 11KB |
| 6 | 26KB | 21KB | 13KB |
| 7 (Default setting) | 29KB | 24KB | 15KB |
| 8 | 32KB | 28KB | 17KB |
| 9 | 36KB | 32KB | 19KB |
| 10 | 43KB | 40KB | 21KB |
| 11 | 48KB | 44KB | 23KB |
| 12 | 52KB | 48KB | 25KB |
| 13 | 56KB | 52KB | 27KB |
| 14 | 60KB | 56KB | 30KB |
| 15 (Low ratio) | 64KB | 60KB | 32KB |
