Description

Introducing the AJA BRIDGE LIVE 12G-4Audio Encoder/Decoder

The AJA BRIDGE LIVE 12G-4 is a high-end IP video encoder/decoder/transcoder designed for demanding broadcast and production environments. It enables real-time conversion between SDI signals and IP streams and manages hybrid SDIIP workflows, with multi-channel UHD/4K support.

The BRIDGE LIVE 12G-4 is part of AJA’s BRIDGE LIVE range , developed in partnership with Comprimato, to meet the needs of live video transport, remote contribution (REMI), streaming, and multi-format distribution .

Here are its main features and functions:

• It supports up to four UHD 4K channels at 60 fps, in simultaneous encoding or decoding.

• It has 4 bidirectional 12G-SDI ports, which can also handle 6G, 3G, 1.5G signals depending on the case.

• It features two 10 GigE ports for network connectivity.

• The enclosure is in 1 RU (rack unit) with redundant power supply to ensure reliability in critical environments.

• It supports the NDI (Network Device Interface) : SDINDI encoding, NDISDI decoding, as well as transcoding between IP and NDI streams.

• It is SRT ready (version 1.5.3), with support for redundant streams and network loss tolerance (hitless).

• It handles metadata, HDR/SDR, timecode, subtitles/closed captioning (CEA-608, 708, line 21, SEI), as well as advertising insertion signals (SCTE-35 / SCTE-104).

• It supports many protocols and containers: HLS (input and output), MPEG-TS, MPTS (input), RTMP / RTMPS, RTP, UDP, SRT (with encryption), VSF TR-01 and VSF TR-07 (JPEG 2000 / JPEG XS).

• It allows multiple configurations: from a single SDI signal, several IP streams can be generated in different formats and destinations (multistream efficiency).

Case studies

Multi-camera transmission to a production site

In a remote production scenario, three encoded cameras from a remote location and then decoded to SDI at the production center, while simultaneously providing a program return to the remote location using the same equipment. The BRIDGE LIVE 12G-4 enables this by maintaining multi-channel synchronization (SDI backhaul) between the streams.

Streaming to CDN with ABR (Adaptive Bitrate)

An SDI source can be encoded into multiple ABR profiles (e.g., 4K, 1080p, 720p) and sent to a CDN via HLS or RTMP/RTMPS, while simultaneously an NDI version is pushed to an internal network for monitoring or internal workflows. The BRIDGE LIVE 12G-4 enables this multi-stream distribution with complete metadata.

NDI integration in a hybrid workflow

In a hybrid IP environment, NDI content can be converted to IP streams (H.264/H.265) or to SDI, while IP streams can also be transcoded to NDI. This facilitates the integration of NDI and non-NDI hardware within the same network.

Contribution with network resilience

Thanks to SRT 1.5.3 support with redundancy , the BRIDGE LIVE 12G-4 ensures reliable delivery of streams even on unstable public networks, with automatic failover in case of link loss.

Remote monitoring and control

The configuration interface can be accessed via browser (Web UI), with local control (DisplayPort / USB) and REST / SNMP API for integration into monitoring / orchestration systems.

Frequently Asked Questions:

1. What is the latency of BRIDGE LIVE 12G-4 ?

   Typical latency is between 200 and 700 ms (inputoutput) depending on the codec, format and configuration chosen.

2. Can multiple streams be managed simultaneously from a single SDI input?

   Yes. The BRIDGE LIVE 12G-4 allows you to generate multiple IP streams (multistream) from a single SDI signal, with multiple formats and destinations.

3. the BRIDGE LIVE 12G-4 support stream redundancy?

   Yes, via the support of SRT v1.5.3 with hitless redundancy, it is possible to ensure uninterrupted delivery on unstable public networks.

4. What are the environmental conditions and electricity consumption?

   It operates between 5°C and 35°C, under a relative humidity of up to 90% non-condensing. Typical power consumption is 190 W, with a maximum of 245W.

5. Can NDI streams be integrated with this device?

   Yes. It offers encoding (SDINDI) , decoding (NDISDI) , and transcoding functions between IP and NDI streams , with multi-discovery support.

Key features of the AJA BRIDGE LIVE 12G-4Audio Encoder/Decoder

• High-density UHD / multi-channel : supports up to 4 simultaneous 4K60 channels

• Codec/protocol flexibility : H.264, H.265, MPEG-2, NDI, RTMP, SRT, HLS, etc.

• Reliability & redundancy : 1RU chassis with dual power supplies and redundant SRT support

• Rich metadata integration : full support for HDR, timecode, SCTE, captions

• IP/SDI/NDI interoperability : bidirectional conversion and hybrid workflows