Home Products IP Encoder HD Encoders (HDMI/SDI 720P/1080P/4K) 4/8/12 HD-SDI (or HDMI) H.265 Encoder
4/8/12 HD-SDI (or HDMI) H.265 Encoder
4/8/12 HD-SDI (or HDMI) H.265 Encoder

4/8/12 HD-SDI (or HDMI) H.265 Encoder

Product ID : STHD-8522H
Product Attributes :

Input: 4/8/12SDI or 4/8/12HDMI 

Output: SPTS and 1 MPTS output

Max Resolution: 3840×2160_30P 4K

HEVC/H.265, MPEG4 AVC/H.264 video encoding format

data sheet for h265 encoder.jpgDownload Specification of STHD-8522H

user manual for h265 encoder.jpgDownload the User Manual of STHD-8522H

Product Description


STHD-8522H 265 encoder is a professional high-end encoder for radio and television, supporting two optional encoding modes: h.265 and h.264. its chip can handle 4/8/12SDI channels or 4/8/12HDMI video as you need. It supports multiple HD resolutions:1080P-50,1080P-25,1080P-30,1080P-60;1080I-50,1080I-60;720P-50,720P-60, max up to 4K 3840x2160P@30, and also supports some special request:1080P-29.97,1080P-59.94,720P-59.94.

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What distinguishes it from ordinary video encoders is that it saves 75% of bandwidth than other encoders because of its ultra-low bit rate after encoding and compression, While it provides higher-quality video output because of its advanced compression algorithm. This is a professional encoder ideal for broadcast television, IPTV, terrestrial wireless transmission systems, and satellite television systems.

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H.265 Encoder Features.jpg

*  4/8/12× SDI(4/8/12× HDMI) input with 4/8/12 SPTS and 1 MPTS output through Data 1 and Data 2

*  HEVC/H.265, MPEG4 AVC/H.264 video encoding format

 Support B frame GOP, high video compression ratio, and stable bit rate

*  MPEG-1 Layer 2, LC-AAC, HE-AAC, HE-AAC V2, AC3 Passthrough audio encoding format.

*  IP output over UDP and RTP/RTSP protocol

Max Resolution to 3840×2160_30P 4K

*  Support QR code, LOGO, closed caption insertion

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*  Support the “Null PKT Filter” function

*  Support PID Remapping/ PCR accurate adjusting

*  Control via web management, and easy updates via web

Principle Chart 

principle chart of encder h265

Technical Parameter

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Order Guide

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H.264 only with more cost-effective: Compare with 4k-60p encoder:
h264 encoder.jpg 2160-60P 4K Encoder h265.jpg

HEVC/H.265 encoder’s advantages

1. Providing smooth TS for modulators

HEVC/H.265 encoder adopts Fujitsu chip which offers stable bitrate with lower fluctuation compared with other encoding chips, so it provides smooth TS for modulators. It is widely used in a variety of digital distribution systems such as CATV digital head-end, satellite, and terrestrial digital TV, etc.

2. Encoding with the highest compression format—B frame (IBBP)

What is B Frame?

There are 3 major picture types used in the different video algorithms, they are I, P and B.

They are different in the following characteristics:

I‑frames are the least compressible but don't require other video frames to decode.

P‑frames can use data from previous frames to decompress and are more compressible than I‑frames.

B‑frames can use both previous and forward frames for data reference to get the highest amount of data compression.

what is B frame?

In one word, B frame is the highest compression format which makes it possible to process HD video at a low bit rate. HEVC/H.265 encoder is not able to save bandwidth unless it is with B frame. In encoder parameters, B frame is often described in GOP (Group of Pictures) structure, like “IBBP”.

Click here to read more:

What is video encoding h.265?

What is the h.265 encoder?

What is the best hardware encoder for H265?

Why is h 265 encodings so slow?

H.265 encoder level

H.265 Encoder Setting

H.264 encoder Vs H.265 encoder

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