Polistream Subtitle Encoder is a highly flexible software and hardware solution for inserting captions and subtitles into broadcast and IP-delivered transmissions. It supports a wide range of formats and workflows, including multi-language subtitle playout, live captioning, and format conversion. Polistream can be deployed as a dedicated appliance or as a software-only solution for virtualized environments, making it adaptable to various broadcast infrastructures. The system is designed to keep subtitles on-air reliably and is backed by 24/7 support.

Key Features

Multi-format and Multi-standard Support Handles a broad array of subtitle and captioning standards and formats.

• Supports DVB, teletext/OP47, EIA608/708, SDI open-captions, and WebVTT for OTT.
• Compatible with SD, HD, and UHD workflows.

Flexible Deployment Available as both a hardware appliance and software-only solution.

• Runs on BroadStream’s U8100 1RU Windows server or as a VM for IP-centric applications.
• Fully configurable to suit different subtitling workflows.

Expandable and Modular System can be tailored and expanded as needs evolve.

• Utilizes software modules and internal cards for custom configurations.
• Supports mixed systems (open and DVB or teletext).

Transcoding and Conversion Facilitates format conversion and transcoding.

• Handles most known subtitle and caption formats.
• Enables mixed playout, pass-through, or transcoding operations.

Operational Reliability and Security Engineered for continuous broadcast operations.

• 24/7 support included.
• Software attack protection.
• Multiple item selection via tagging for efficient workflow management.

Benefits

Workflow Versatility Adapts to diverse broadcast and streaming subtitle workflows.

• Supports live, file-based, and mixed subtitle/caption operations.
• Multi-language and multi-channel capabilities.

Future-proof and Scalable Designed to evolve with new standards and distribution schemes.

• Easily expandable with new formats and hardware/software updates.
• Suitable for both traditional broadcast and modern IP/OTT environments.

Operational Assurance Ensures subtitles remain on-air and compliant.

• Backed by round-the-clock support.
• Proven reliability in global broadcast environments.