NEW: The worlds smallest H.265 mobile encoder

Smart-telecaster Zao-S

Smart-telecaster Zao-S, the world’s smallest mobile H.265 HEVC hardware encoder, enables full HD live video mobile transmission of live events via 4G from remote locations, to anywhere in the world, with a simple unit attached to the camera.

Product Overview

Challenges live mobile video streaming

High quality mobile video streaming can be challenging from remote locations such as news-gathering situations or other live events that may include sports events being filmed over a wide area. Cameras may need to provide live video streams from a car, motorcycle, drone or helicopter that are moving at speed. The fluctuating availability of the 3G or 4G cellular network makes it hard with traditional systems to maintain reliable HD quality of live streaming content. The RASCOW algorithm combined with H.265 and its small size and weight, the Zao-S provides high reliability that is easily transportable even on a person or bicycle. It can easily be held in a body strap or mounted directly to the camera.

The miniature Smart-telecaster Zao-S maintains HD quality in low 3G or 4G bandwidth environments

Smart-telecaster Zao-S, the world’s smallest mobile H.265 HEVC hardware encoder that can be attached to any broadcast camera, solves these issues. Thanks to the compression capabilities of H.265, coupled with its RASCOW technology, high quality mobile HD live streaming is possible even in low 3G or 4G bandwidth environments. This makes it a first class product for encoding on the move for reliably streaming live broadcast quality content.

Smart-telecaster Zao-S: Minimal latency whilst covering live events

When streaming live events, especially news, a one second delay is very noticeable – Zao-s can provide minimal latency typically half a second but as low as 240ms. Production companies, broadcasters and journalists are no longer getting frustrated with reliability, delay and image quality. Broadcasters and production companies can save money without the need for satellite, RF services or an Outside Broadcast (OB) truck.

Item Specification
Encoding system H.265 Main Profile
Pixel (NTSC) 720×480, 360×480 (Half-SD, Full motion)

720×240 (Field thinning)

Pixel (PAL) 720×576, 720×288, 360×576 (Half-SD, Full motion), 720×288 (Field thinning)
Pixel (HD)

*50i and 59.94i

1920×1080, 960×1080 (Half-HD, Full motion),

1920×540 (Field thinning), 960×540, 640×360,

1280×720, 640×720

Bit Rate 200kbps~5Mbps
Field Rate Maximum 59.94fps(59.94i)/50fps(50i)


Item Specification
Circuit type WCDMA, LTE, Wireless LAN, Wired LAN, WiMAX, Wi-Fi, BGAN
Error correction ARQ
Encryption AES256bit
Authentication Passphrazes (Up to 32 characters)
Multilink Up to 3 lines
Connecting function Manual connection, Automatic connection on Startup or Abnormal disconnecting
Noncommunication continuing time Up to 60 seconds
Item Specification
Supply Voltage DC10.5V ~ DC17V
Exclusive AC Adapter:  DC15V/2.7A
Exclusive External Battery:  DC14V/3A


Operation(USB Maximum Load): About 35W
Operation(Charging):About 25W
Operation(Normal):About 13W
Standby(Power OFF):About 250uA
USB Load depens on the connected devices
Operating Time Operation(ON-AIR): About 1 hour

Standby: 90 days

USB modem x 3

Average operation



78mm(W) x 123.5mm(H) x 35.5mm(D) Without Projection
Body weight About 410g Including Jacket
Product weight About 330g Unit weight
Temperature and humidity for Use 0 to +40℃ / 20 to 80%RH Without condensation
Temperature and humidity for conservation -20 to +60℃ / 10 to 80%RH Without condensation


Item Specification


Function Live relay receiving

(One-way Video, Two-way Audio)
Stored file receiving, File receiving, Still image acquisition

Supported Product STC Zao-S、STC Zao、STC HDCam、STC for iOS ML
Concurrent Connection 4/1
Delay Time 240msec~30000msec
Codec Video VP8, H.265
Audio Vorbis


Android OS Android 4.1+ (Recommendation: 4.4+)
Device Undefined
iOS OS iOS6+
Device iPhone 3GS+, iPad2+
Wifi AP



SSID Generated from SUID
Password Generated from SUID

Key features Smart-Telecaster Zao-S:

Real time mobile HD video transmission direct from the camera

Smart-telecaster Zao-S is a portable video H265 HEVC encoder that compresses video in real-time enabling full HD live video streaming to anywhere in the world, while on the move.

Lightweight and small

Due to its lightweight (about 350g) and portability, the Zao-S can be carried either on body strap or can be mounted on a camera and connect either via HD-SDI or HDMI to the camera.

Supports H.265 video compression standard

Smart-telecaster Zao-S is equipped with the H.265 video compression standard. H.265 technology improves encoding and compression by approximately 50% compared to H.264 compression. As a result HD picture quality can be maintained even when the mobile phone signal strength becomes low and with very low latency (0.5 seconds).

RASCOW technology

Smart-telecaster Zao-S connects up to 6 SIM cards via external dongles that can be bonded together to form a single connection via 3G, 4G or WiFi. RASCOW technology monitors the changing mobile signal strength in real time and adapts the most optimum bonded combination of the 3G, 4G and WiFi connections. As a result the quickest and most reliable delivery across the internet is given to the decoding platform. This continues to give reliable video contribution even when signal strengths becomes low or fluctuates rapidly.

Easy to carry

Smart-telecaster Zao-S is a portable video encoder. The specially strap that comes with the product is easy to carry and operate.

Power saving

Smart-telecaster Zao-S  contains on internal battery and external battery

Advanced connectivity

Smart-telecaster Zao-S supports a variety of mobile networks such as WCDMA, LTE, 3G, 4G, WiFi, ethernet, etc.

Multi-Link technology

With multi-link technology in Smart-telecaster Zao-S you can use up to 3 mobile data cards simultaneously. This strongly improves the quality of broadcasting under weak signal conditions.

Receives multiple video streams

Our Smart-telecaster Zao-S  viewing software can receive up to 4 video streams from 4 different camera units at the same time.

Supports 1080i standard for full HD TV

Smart-telecaster Zao-S supports the
HD-SDI/HDMI (1080i) video standard for full HD TV achieving unprecedented high quality digital video.

Secure communications

To guarantee secure communications Smart-telecaster Zao-S supports
authentication and encryption(AES 256bit).

Live with your Smartphone

STC for ML CAM is now available in the App store for mobile video transmission just using your iPhone.


Technology for optimized mobile communications

Key features of RASCOW technology

Click on the image to enlarge

Our technology for optimized mobile communication is called RASCOW (Real-time Auto-Speed Control based on Waterway model). RASCOW technology automatically balances the load between various network base stations during live broadcasting. This allows unprecedented stability in image transmission, even under network congestion or weak network signals.



Smart-telecaster ZAO-S video

Contact us for more information.

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Why Soliton Systems?

  • Experts in live broadcasting & IT security
  • Cutting-edge technology
  • Stable Transmissions
  • Over 30 years of experience
  • More than 2000 premium brand customers

Zao-S Brochure

Smart-telecaster Zao-S user brochure

Additional information

Go to Smart-Telecaster ZAO website

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