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Color Fidelity Test for Streambox Chroma in Native RGB, XYZ Color and YCrCb 4:2:2 for SDR or HDR

By | 2K Rackmount, HD Rackmount, Streambox 4k, Streambox Chroma, Streambox Platform Solutions | No Comments

The Streambox Chroma rackmount half-duplex Encoder/Decoder with ACT-L5 codec is well suited for post-production editing and color correction workflows in SDR or HDR. The ACT-L5 codec supports Native RGB and XYZ color space, 10 and 12-bit color depth, and the 4:2:2 and 4:4:4 color profiles. The Streambox Chroma rackmount has been tested for color stability and fidelity and has met SMPTE 372 standard including HDR modes.

Native RGB vs DCI/ICT RGB Test

A color-bar software generator (Blackmagic 4K monitor, SDI out) was connected to a Streambox Chroma Encoder (with Blackmagic 12G Pro, SDI-in) which was connected to a Streambox Chroma Decoder via an IP network hub. The decoder output was to a Blackmagic 4K monitor. On the decoder, we read the SDI value averages before data is passed through the SDI out (after all conversions are complete). Findings:

Native RGB encoding does not perform any color transform and encodes RGB values natively. RGB ICT mode performs RGB transform to/from DCI ICT (compatible with DCI ICT, ISO/IEC 15444-1). Both modes are supported via Streambox Croma UI. Streambox Chroma supports both full and legal ranges.
Following test were performed in Full range mode.
• Native RGB has less errors than ICT (+1 in last 12-bit digit)
• Clipping for reserved SMPTE 372, 12-bit SDI values:
Software generated values 0-15 are clipped to 16 by hardware (base)
Software generated values 4080 to 4096 are mapped to 4079 by hardware (ceiling)

The 10 Bit 4:2:2 Chromatic Test for Rec.709/Rec.2020 (HDR)

A Streambox Chroma Encoder with Decklink 4K Pro was connected through a network hub to an identical Streambox Chroma Decoder.1 Source format: 1080p24. The encoder was set to Full 2K resolution, 10-bit color depth, 4:2:2 color profile, and Rec 709 color space. The decoder was in test mode. The table below shows that the color values were identical between the source and the decoder out.2 The values where stable with no vibration. Since no color space conversion is performed in 4:2:2 mode, the same result applies to Rec.2020 signal fidelity.


The Streambox Chroma rackmount Encoder/Decoder with ACT-L5 compression and support for Native RGB 4:4:4 and YCrCb 4:2:2 delivers color coding consistent with SMPTE 372 standards. Furthermore, these tests demonstrate that the measured colors before and after chromatic conversions were identical, making the Streambox Chroma ideal for color correction workflows including support Rec.709, DCI P3, Rec.2020, HDR10 PQ/HLG and Dolby Vision.

For more information on Streambox Chroma click here, or the link below. For additional information or questions on the Streambox Chroma please contact our sales team. Also, if you wanna check out what else is new from Streambox, check out our “What’s New?” page for more information.

1. Both Encoder and Decoder are the same models, one running the encoder software and the over running the decoder software.↩
2 Testing was carried out with a Leader LV-7700 Rasterized SDI Signal Monitor↩


Introducing the Re-Branded Streambox Chroma Rackmount

By | 2K Rackmount, Cloud, Apps & Software, HD Rackmount, Streambox 4k, Streambox Chroma, Streambox Rackmounts | No Comments

The Streambox Chroma Encoder/Decoder rackmount with ACT-L5 codec is uniquely suited for Post Production workflows with support for 12-bit, 4:4:4 color, and the Rec.709, DCI-P3, and Rec. 2020 gamut specifications.

Streambox has taken its Chroma 2 steps further with support for:

• High Dynamic Range (HDR) Video
• Uncompressed Audio

“HDR will provide a deeper, more precise color range with greater contrast control for the growing UHD media market” said Alex Telitsine, CTO. Add to that support for embedded uncompressed audio for a rich, unadulterated sound. CEO, Bob Hildeman is committed to delivering industry leading Post Production products – “Streambox is dedicated to meeting the needs of the Post Production industry.”

ACT-L5 Codec is Ideal for Cinematic Color Grading

• HD, 2K, 4K
• 4:4:4, 4:2:2, and 4:2:0 color
• 12, 10, and 8-bit color depth
• Rec.709, DCI-P3, and Rec.2020 color gamut
• Native RGB support
• Native high dynamic range (HDR)
• Native High Frame Rate (HFR)
• Uncompressed Audio

Streambox Chroma is Ideal for Collaborative Workflows

• ACT-L5 Codec
• Video Encryption – end-to-end AES 128-bit encryption (256-bit available with added restrictions)
• LDMP Bonding Protocol – 500ms to 2sec end-to-end latency over fiber and public internet networks
• Remote monitoring with NODE™ Media Player and iOS Media Player – is ideal for real-time collaboration with colorist, editors, director, and producers; where ever they may be located
• Upgrade Path – Meet your HD and 2K Post Production needs today, upgrade via license for tomorrow’s 4K needs

For more information on Streambox products and the Streambox Chroma please click the links below. If you are interested in purchasing the Chroma please contact our sales team.


Streambox Delivers Better Pixels with 12-bit 4:4:4 RGB Color

By | 2K Rackmount, Events & Media Coverage, Streambox 4k, Streambox Insider, Streambox Platform Solutions, Streambox Rackmounts | No Comments
We are pleased to announce upcoming support for 12-bit 4:4:4 RGB color space for the Streambox Chroma encoders and decoders.
Both encoders and decoders have been designed for maximum flexibility.
The user can do 12 bit RGB in and out simplifying overall workflow with no compromise.
Monosnap 2018-03-31 09-52-59
If Display equipment does not support 12 bit, the user can select to down convert 12 bit to 10 bit on output.
Monosnap 2018-03-31 08-31-41
For low bitrate scenarios, users can select 4:2:2 or 4:2:0 encoding profiles while maintaining RGB on input and output via “Force RGB” option on decoder.
Note: 4:4:4 or 12 bit mode requires RGB signal.
For broadcast workflows, new encoder support 59.94 and 60 fps frame rates in 10-bit color space.
10 and 12-bit support is perfect match for HDR color grading in either RGB or 4:2:2 modes
Monosnap 2018-03-31 08-37-20
Visit us at NAB 2018 next week to see demos and test workflow. We will have DaVinci Resolve Studio setup with our encoders and decoders. Bring your files or sample projects in if you want to check your workflow in action! Schedule private meeting TODAY!

Streambox Exhibits 12-bit, 4:4:4 RGB Codec & Post Solutions at HPA

By | 2K Rackmount, 9200 Rackmount, 9300 Rackmount, Cloud, Apps & Software, HD Rackmount, Live Events, Post Production, Press Release, Streambox 3D-IMAG, Streambox 4k, Streambox Cloud Services, Streambox NODE, Streambox Rackmounts | No Comments

February 20, 2018  Seattle –  Streambox will present upcoming next-generation video compression technology, ACT-L5 Codec, their new modular 4K/2K/HD Rackmount encoder and decoder, and Cloud and software solutions for low latency live remote sessions at the 2018 Håollywood Professional Association (HPA) Tech Retreat.


The next generation ACT-L5 Codec produces the 12-bit, 4:4:4 RGB color profile required for cinematic, episodic, and commercial color grading and editing. This is also ideal for live events, digital signage,  and broadcast video where High Dynamic Range (HDR) video is desired.

Streambox products provide secure and ease-of-use solutions for cinematic, episodic, and commercial live sessions for post production workflows by providing:

  • Remote real-time creative collaborations including color grading & editing over the Internet and MPLS networks.
  • Cloud for multi-location Post Production allowing teams and owners to collaborate
  • Mix and match hardware and software of  MacOS, iOS, Windows, and Android  products to meet project requirements and budget
  • ACT-L5 Codec for 4:4:4 RGB Color support (to be demoed at the show). The ACT-L5 video codec, designed to work with Rec.709, DCI-P3, and Rec.2020 is setting a new bar for production quality.
  • Software Apps and modules include: HD, 2K, and 4K encoder/decoder, media players for MacOS, iOS, Windows, and Android, encryption, 2K Stereo Video, 12-bit 4:4:4
  • Strong AES-128 encryption for content protection

Meet with Streambox to see new products

Streambox new modular Rackmount HD 2K 4K 3D encoders and decoders

Streambox Modular Encoder / Decoder rackmounts based on the industry-leading ACT-L3/ACT-L5  codec for unrivaled performance, reliability, high quality, and low latency, video over IP networks. Streambox Modular rackmounts are well suited for Broadcast, Enterprise, and secure collaboration for Post Production workflows.

Streambox Cloud

Streambox’s  Cloud Service is a secure service that provides reliable multi-point collaboration infrastructure and software for the needs of post-production professionals. Streambox Cloud supports encrypted streams, high-quality HD, and 4K low latency videos for review, edit, and color grading.

Streambox NODE

NODE is a small form factor media player device supporting ten video channels which will automatically “pull” live video from Streambox Cloud and Enterprise Server or directly receive from an encoder for live video playout to HDMI connected monitors.

Other products Streambox will present during the webinar include 4K & Hybrid HD software encoder, Media Player Pro, new iOS Media Player, etc.

Streambox Technology

Advanced Streaming Codec

All Streambox products are powered by the proprietary codec, Advanced Compression Technology – Level 3 (ACT-L3), Advanced Program 2017. Streambox ACT-L3 AP 2017 compression allows for fast encoding with low latency and is optimized for video transmission over any IP connection. ACT-L3 is capable of compressing high motion, complex video at low data rates with the advanced motion search feature.

Streambox LDMP Technology

All Streambox products come equipped with Streambox exclusive Low Delay Multi-Path technology (LDMP). Streambox LDMP protocol allows low latency adaptive bitrate streaming on public and private networks. Streambox encoders will automatically select the best possible bandwidth, latency, and resolution over multiple IP networks, allowing Streambox products to gracefully handle network bandwidth fluctuations and dropouts which are often seen over public or shared network environments.


Media Contact

Name: Summer Sun

Title: Marketing Specialist

Email address: marketing@streambox.com


GEM Hospital & Research Center Streams Live with Streambox 4K

By | Avenir, Avenir Micro, Cloud, Apps & Software, Medical, Streambox 4k, Streambox Rackmounts, Success Stories, Video Transport | No Comments

GEM Hospital and Research Center provides surgical training via GEM Televersity (https://gemteleversity.com/), a program of the GEM Institute of Laparoscopy and Robotic Surgery which provides daily live surgical experience, and monthly CME deploying real-time video streaming. Prof. R. Venkatachalam of the Institute wanted to extend this live surgical training experience to participants of a conference-workshop about 160km (100mi) away (see Figure below).

Figure 1. Left: Auditorium of attendees of GEM workshop. Right: Real-time laparoscopic surgery with real-time, interactive, audio displayed on large, 40’x22’ LED displays

Streambox’s 4K OSX encoding software was used to capture and encode live video from Olympus 4K laparoscopic cameras and transported live video stream over a point-to-point IP network at a bitrate of 40Mbps to the conference facility where the video was played out on a large LED display. The video end-to-end latency was very short at about 0.8 to 1.2 seconds which was ideal for real-time training of surgical procedures over IP based networks to remote locations.

Prof. R. Venkatachalam commented that “the conference was great with live surgeries from 100 miles away … It so happened we launched 4K streaming on ‘The World Audiovisual Day’.”

Streambox 4K Encoder is powered by Streambox ACT-L3 Codec that produces exceptional color depth and accuracy used in Broadcast and in Film Post Production industries. ACT-L3’s more efficient encoding and wider color support provides a high quality live video for large displays making it ideal for medical training.

For low latency reliable video transport over IP networks, Streambox has integrated into the Streambox 4K Encoder reliable LDMP (Low Delay Multi-Path) network transport protocol.

Streambox video transport products are particularly well suited for use in live video medical training; either onsite or at any remote location. There are three main opportunities when using live video for medical training: 1) Students can view an unobstructed closeup of the procedure, 2) Students can view team interactions and cooperation, and 3) Students can be guided through the procedure by audio comments from the team (including, if appropriate, comments and questions from the students back to the team).

Streambox offers many exciting approaches to deliver these opportunities. Our equipment is deployed in many medical institutions around the world.


  • Onsite Viewing
    Classrooms, conference rooms, study halls, libraries, and lecture halls are all great teaching locations to stream live procedures. In years-gone-by and on TV they had operating theatres where students could only imagine what was happening. In the 21st century, the student can see exactly what the surgeon sees.
  • Remote Viewing
    Since Streambox uses video transport over IP networks, live video can be streamed to any classroom in the world (as long as they have good internet connectivity). This can be accomplished via point-to-point or over the Streambox Cloud. Furthermore, the classroom could be on a student’s laptop with Streambox Media Player installed. Or the classroom could be on each student’s smartphone with Streambox’s Android and iOS Media Player installed – and each student could be in a different country.
  • Remote Consultation
    Using remote viewing, consults and critiques can take place from anywhere in the world – you don’t need the expert in your OR to get quality feedback.
  • Encryption
    Streambox encoders and decoders support AES 128-bit end-to-end video encryption ensuring that adherence to regulations on Protected Health Information (PHI) can be met. An AES 256-bit encryption option is available with separate license and US Federal restrictions.
  • Real Time Video
    Streambox transport codecs are so efficient that latency within a local network can be 500msec and over the internet around 2 seconds (depending on the settings, internet bandwidth, and location of the viewer). This low latency along with its high video fidelity are why Streambox products are used by major news networks and movie studios.
  • Remote Medicine
    Streambox remote encoders with cellular modem modules can provide live video streaming from field locations; e.g., streaming an ultrasound output to a regional medical center.


  • HD and 4K Rackmount Encoders and Decoders
    HD images are great for viewing procedures on monitors up to about 90 inches. 4K is great for anything above 90-inch monitors.
  • HD 2-Channel Synchronized Encoders
    2-Channel synchronized encoders (also known as 3D encoders) allows for synchronized views from 2 cameras. This is ideal for watching synchronized closeup and wide-angle views; e.g., a synchronized closeup of a surgical procedure and a wider angle of the surgical team.
  • HD Mobile Micro Encoders
    Mobile encoders are an economical way to have 1 or many cameras in the same or different locations. For example, one camera can be zoomed in for a closeup of the procedure while another 1 or 2 cameras can be simultaneously viewing the team’s interaction. Or you could have streams from every procedure/operating room.
  • Mobile Cellular Modules
    This allows the Micro encoder to be used from any location with cell/mobile connectivity. The opportunities are only limited by one’s imagination; remote ultrasound, emergency first-aid stations or field hospitals, medical rescues and situational awareness, patient visualization at the scene or within a mobile ambulance or helicopter.

For more information on Streambox products and the 4K Rackmount please click the links below. If you are interested in purchasing the 4K Rackmount please contact our sales team.