VID-01

AVoIP Bandwidth & Switch Topology

SMPTE ST 2110 · SMPTE ST 2022-7 · SMPTE ST 2028 · ANSI/BICSI 007-2024

01 · Video format

Resolution

Frame rate

fps

Bit depth

bits per component

Chroma subsampling

Codecⓘ

02 · Audio and ancillary

Audio channels per stream

Sample rate

Audio bit depth

bits

03 · System size

Encoders (sources)

Decoders (displays)

04 · Network fabric

Edge port speed

Leaf-to-spine uplink speed

Usable ports per leaf switch

Design headroomⓘ

Awaiting input14 fields left: Resolution · Frame rate · Bit depth · Chroma subsampling · Codec · Audio channels per stream · Sample rate · Audio bit depth · Encoders (sources) · Decoders (displays) · Edge port speed · Leaf-to-spine uplink speed · Usable ports per leaf switch · Design headroom

Drawing

The drawing appears when the inputs are complete

01
Size AV-over-IP stream bandwidth from resolution, frame rate, bit depth and codec, then check switch port capacity, leaf count and uplink requirements including ST 2022-7 redundancy.
02
Tip. Bandwidth is rarely what breaks an AVoIP network first. PTP timing degrades under load well before a link runs out of capacity, and multicast without IGMP snooping floods every port regardless of how much headroom the arithmetic says you have.
03
2.49 Gb/s — Uncompressed 1080p60 4:2:2 10-bit
04
2× — ST 2022-7 seamless protection
05
70 % — Recommended link utilisation
06
PTP — ST 2059 timing

AVoIP bandwidth and topology

An AV-over-IP design has two halves. Per-stream bitrate follows directly from the video format and the codec; whether the network carries it depends on how those streams are routed across switches and uplinks. A design can be comfortable on aggregate bandwidth and still fail on a single oversubscribed trunk.

Per-stream bitrate

Uncompressed rate is fixed by the pixel clock and the bits carried per pixel. Chroma subsampling and bit depth change it directly; compression then applies a codec-specific ceiling.

Use cases

4:4:4 full colour — 3 samples per pixel
4:2:2 professional — 2 samples, 33 % reduction
4:2:0 consumer — 1.5 samples, 50 % reduction
Add IP encapsulation overhead, typically 3–10 %

Formula

Mb/s = (width × height × frame rate × bits per pixel) ÷ 1,000,000

SMPTE ST 2110

Switch and uplink sizing

Edge ports carry endpoints; the leaf-to-spine uplink carries everything crossing between switches. Seamless protection duplicates every protected stream onto a second path.

Use cases

Size uplinks on streams that cross, not total streams
ST 2022-7 redundancy doubles protected traffic
Keep links at or below about 70 % utilisation
IGMP snooping is mandatory, not optional

Formula

Uplink load = Σ(streams crossing the trunk × stream bitrate)

ST 2022-7 · ST 2059 PTP

Manufacturer bitrates for proprietary codecs are published figures rather than derivations, and they vary with content. Where a protocol’s rate is a vendor ceiling rather than an arithmetic result, this tool reports it as such on the face of the report.