Table 1. Recommended bit rates for live streaming
| Video size types | Video size | 4:3 aspect size | 16:9 aspect size | Total bit rate (Kbps) | High-motion events (sports, news events) |
Low-motion events (music events, concerts) |
% US broadband consumers* | ||
|---|---|---|---|---|---|---|---|---|---|
| Video bit rate (Kbps) | Audio bit rate (Kbps) | Video bit rate (Kbps) | Audio bit rate (Kbps) | ||||||
| QCIF | 176×144 | 144×108 192×144 |
192×108 256×144 |
48 96 |
32 80 |
16 (mono) 16 (mono) |
32 80 |
16 (mono) 16 (mono) |
Modem and ISDN 2% |
| CIF | 352×288 | 288×216 320×240 |
384×216 384×216 |
300 500 |
268 468 |
32 (stereo) 32 (stereo) |
268 468 |
32 (stereo) 32 (stereo) |
Low-end DSL 4% |
| D1 | 720×486 | 640×480 640×480 |
852×480 852×480 |
800 1200 |
768 1168 |
32 (stereo) 32 (stereo) |
736 1136 |
64 (stereo) 64 (stereo) |
Faster DSL 25% |
| HD | 1280×720 | – – |
1280×720 1280×720 |
1800 2400 |
1736 2336 |
64 (stereo) 64 (stereo) |
1672 2272 |
128 (stereo) 128 (stereo) |
Cable modems 69% |
* Note: Basedon the IDC 2008 Consumer Panel Broadband Survey. Each figure represents the percentage of users who have the bandwidthto support the respective total bit rate in that category. For example, 25% of usershave bandwidth of at least 1200 Kbps to support the D1 video type but don'thave the higher bandwidth needed to support the next higher bit rate of 1800Kbps.