promwad STB Design

Conditional access systems (CAS) in STB

There are STB for viewing only uncoded channel (Free to Air — FTA), as well as with the support of different conditional access systems (CAS). Rather a great amount of such systems are currently represented on the market of digital broadcasting.

The most popular among them are VIACCESS, IRDETO, CONAX, MEDIAGUARD and NAGRAVISION. Regional conditional access systems are worth noticing as well. They have become widely used in the CIS: CryptOn, DVCrypt, NordE, MSA, DRE.

For most end users of digital telecommunications systems, CAS embodied in the form of smart cards or CAM-modules (Conditional Access Module), which are inserted into the appropriate STB slot and allow the user to access a variety of information services: TV channels, radio, Internet resources, teleconferences, "video on demand" (VoD), etc.

Promwad’s engineers use two different technologies for a conditional access implementation in STB:

CAS implementation with Conditional Access Module

Conditional access support implementation using CAM (Conditional Access Module) and CI (Common Interface).

STB Conditional access system with external CAM
Picture 1. STB Conditional access system with external CAM

Scrambled transport stream is sent to external CAM, being decoded and sent to decoder.

Promwad realized and tested a software stack by EN 50221 standards with the following CAM modules: Conax, Irdeto, DRE, Viaccess, XCrypt.

 

CAS implementation in STB

Conditional access systems integration into set-top-box software.

Picture 2. Conditional access system in STB with embedded descrambler and external smartcard
Picture 2. Conditional access system in STB with embedded descrambler and external smartcard

Descrambling is implemented by embedded hardware descrambler. An external smartcard for decryption keys is used (supplied by service provider).

The following systems were successfully integrated by Promwad’s engineers:

Integration is made by STB software engineering according to the requirements of a conditional access system provider. After software implementation a testing procedure is being lunched to prove compliance with the system requirements. Next step is a certification of STB by CAS provider.

 

 

Conditional access systems (CAS) in STB in promwad

Our case-studies in digital TV

Sport Club App for Smart TV: Tizen, WebOS & Android TV We've developed an application for Smart TV with live streaming, VOD, and voice control support

Android app for the biggest e-book vendor in CISAn application for Android-based devices for the selection and listening to your favourite audio books — LitRes: Listen!

Smart TV app for Tizen Samsung & WebOS LG TV We've developed an IPTV application with the TimeShifting, EPG, PVR, and pause/rewind features

Embedded UI customization for a set-top box We've created a software framework that allows the customer to change the user interface with minimal efforts

TI DM373-based SoM for video surveillance projects We've designed the CPU module based on the TI DM3730, which helps cut the time, costs, and risks of designing new products

AI application for set-top box: searching and buying products from video streaming

Shoppable video: AI-based app for STB & Smart TV We've developed and installed on STBs the first AI application for searching and buying clothes directly from the video stream

Locus DVB-T STBWe have developed a digital TV set-top box (STB) with support for DVB-T (MPEG-2/4) and terrestrial digital broadcasting

promwad have designed a digital IPTV STB with DVB-T and DVB-S/S2 support, based on the SMP8654 processor by SigmaDesigns

IPTV STB with DVB-T/S/S2We have designed a digital IPTV STB with DVB-T and DVB-S/S2 support, based on the SMP8654 processor by SigmaDesigns

SmartLabs IPTV set-top box We have developed a range of IPTV set-top boxes, ensured license coverage for all the proprietary coding standards for audio and video
Smart home multimedia controller

Smart house controller (HDMI-CEC) for a Swiss company We have designed the HDMI-CEC controller to manage a home multimedia complex: cinema, tuner, VCR and other devices

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