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4K Low Latency / Narrowband Encoder & Decoder

Product Features

LLC-4000 is a 4K video encoder system featuring support for low latencies of less than 50ms and narrowband networks of 100 kbps or less.


– Dual function encoder and decoder
– Ultra-low latency under 50msec at 4K60p in low latency mode
– Reliable and clear video quality on bandwidth limited narrowband networks under 100 kbps in narrowband mode
– Supports Peak Rate Control and FEC/ARQ error correction/retransmission for reliable and secure narrowband transmission
– Simultaneously decode, map and output up to 4 video streams in up to 4-way split screen display

Configuration example

Connection configuration example

Video Codec
Built around leveraging full support for both H.264/AVC and H.265/HEVC.

Video Streaming Protocol Flexibility
Multiple video streaming protocols are supported including UDP, RTSP / RTP, and multicast.
Additionally, both IPv4 and IPv6 networks are supported.

Narrowband Video Quality Control
Our Peak Rate Control technology precisely manages input bandwidth so not to exceed a specified maximum, enabling stable and reliable video transmission that maintains clear video quality even in heavily constrained networks.
In addition, Forward Error Correction and ARQ (retransmission control) can be enabled for error concealment and secure transmission.

RoI (Region of Interest)
ROI mode when enabled maintains clear video quality in a selected area while input bandwidth is limited to a specified data rate.
The selected area can be changed from the decoder management portal.

Video Display Output
Up to four streams can be simultaneously decoded and output in a four way split screen mapped display.

Video Input/Output
Video input/output by HDMI is supported directly. Additionally, HD-SDI is supported via video converter.

Audio Input/Output
Audio input/output via either HDMI or USB interface.

LLC-4000 Video Transmission Verification Configuration

4KLLC Video Transmission Verification Configuration

Product Specifications

Product Encoder Decoder
Video Input
2160P (3840×2160) @25Hz, 30Hz, 50Hz, 60Hz
1080P (1920×1080) @25Hz, 30Hz, 50Hz, 60Hz
1080I (1920×1080) @50Hz, 60Hz *1
2160P (3840×2160) @25Hz, 30Hz, 50Hz, 60Hz
1080P (1920×1080) @25Hz, 30Hz, 50Hz, 60Hz
Codec Resolution 128×90~3840×2160
Framerate 2~60fps
Bitrate 20kbps~25Mbps
Mixing Setup of video output as 2160P :
1920×1080 input stream ×4 stream→4 split screen display
Setup of video output as 1080P or I frame : 720×480 input stream ×4 stream→4 split screen display
Audio Sampling 48KHz
Codec AAC-LC/Opus
Bitrate AAC-LC : 64kbps~320kbps
Opus : 16kbps~160kbps
Network Protocol TCP/IP, UDP/IP, Multicast, SRT (server), RTSP (server) TCP/IP, UDP/IP, Multicast, SRT (client)
QoS *2 FEC (Error Correction) /ARQ (Retransmission)
I/O Video / Audio HDMI2.0 x1
Network 10/100BASE-TX/1000BASE-T x1
Other USB3.0 (Type-A) x2 (can be used for audio input/output)
Power DC +12V (equal or less than 20W)
Operating Temperature / Humidity Operating Temp : -10℃~+50℃ / Humidity : 10%~80% (non-condensing)
Dimension / Weight 154(W) x 39(H) x 253(D) mm (excluding protrusion)
Under 1.0kg (excluding AC adapter)

*1 : 1080I @ 50,60Hz input is converted to progressive format and encoded
*2 : This function is not supported by SRT and RTSP protocols


4K Low Latency / Narrowband Video Encoder / Decoder
LLC-4000 -Ultra Low Latency Codec-

Product appearance