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  • Video Streaming | VXG-6
    Video Streaming | VXG-6

    Real-time IP streaming solution (H.264/AVC | MPEG-2)

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VXG-7 - Video streaming in real-time

vxg6-hardware

The VXG-7 encoding and streaming solution provides real-time streaming for both standard and high definition video. The multichannel encoding unit encodes up to four SDTV / two HDTV feeds either in H.264/AVC or MPEG-2. All outgoing transport streams are DVB compliant. The integrated forward error correction mechanism ensures video quality on glitchy transmission media.

VXG-7 DVB encoders offer cost-effective broadcast quality 24 hours a day. They are perfectly suited for studio links, SNG and content distribution to IPTV-headends.

 

VXG-7 - Key Features

  • Real-time H.264/AVC video encoding and streaming in SD or HD resolution (720p/1080i)
  • Direct-to-DVB output over ASI | QAM | COFDM | IP Ethernet (incl. Multi-service streaming)
  • Robust broadcast streaming architecture
  • QoS (RSVP)
  • Robust lip-sync mechanism even on transmission errors
  • PRO-MPEG FEC
  • Unicast/multicast mode
  • UDP/RTP transmission
  • Integrated teletext transmission (SMPTE-2031/OP47)
  • SD/HD-SDI Embedded audio
  • Dolby Digital and Dolby Digital Plus audio encoding
  • MCTF (Motion Compensated Temporal Filtering) and De-blocking
  • AFD (Active Format Description) signaling
  • Redundant power supplies and automated restart after power or network loss

VXG-7 - Workflow example

vxg7 workflow preview

Unicast / Multicast

VXG-7 allows unicast as well as multicast transmissions. The system requires at least a unidirectional IP-based data link. The data rate is adaptable to the available bandwidth. Lip synchronisation is guaranteed even on transmission errors.

 

Multiformat encoding

Most broadcasters will want to reach the largest audience by supporting more than one platform with many different bit rates and formats. VXG-7 can encode a high resolution, standard resolution and even a PIP stream at the same time. Encoding profiles can be saved as XML.

 

Operation Modes

Star-shaped and cascaded distributions are possible. If more than one transmission path is used, VXG-7 will route the data rate through all available channels (multi path) to maximize the overall throughput.

 

DVB service information

Along with the video, service information (SI/PSI) and teletext data can be transmitted. VXG-7 has an automated format detection for signalizing the outgoing transport stream (WSS). Besides generating all mandatory DVB tables, the VXG-7 encoding software optionally provides PID filtering, stream duplication, restamping and remultiplexing functionality.

 

VXG-7 - Technical specifications

The VXG-7 streaming solution provides real-time streaming through low-bandwidth connections (e.g. xDSL) based on H.264/AVC. Here are some example specifications:

INPUT / OUTPUT
Audio / Video
SDI    SMPTE 259M
HD-SDI SMPTE 292M
Transport stream 
ASI DVB-ASI (optional)
Ethernet IP Stream (RTMP, RTSP, TS over UDP/RTP/TCP)
RF 8VSB / 16VSB (optional)
Resolution and frame rates 
SD 576i @ 25 x 720
480i @ 29.97 x 720, 704 
HDV 720p @ 50, 59.94 x 1280 
HDTV 1080i @ 23.976 | 24 | 2.5 | 29.97 | 30 | 50 | 59.94 | 60fps x 1920
Input signal synchronization 
External Black Burst / Tri-SYNC
Output error correction
FEC Pro-MPEG
   
MPEG-ENCODER 
SD video 
MPEG-2  MP @ ML 1 to 15 Mbps 4:2:0
H.264 / AVC  MP @ L3 0.5 to 10 Mbps 4:2:0 
HD video 
MPEG-2 MP @ HL 2 to 25 Mbps
H.264 / AVC HP @ L4 1 to 25 Mbps
Audio
MPEG-1 Layer II 32 to 384 kbps
AAC-LC 16 to 576 kbps
AAC-HE V1 / V2 16 to 128 kbps
Dolby® Digital up to 640 kbps (AC-3 2.0)
   
TS-MULTIPLEXER
Video format MPEG-2 / H.264
Audio format MPEG-1 Layer II / AAC / Dolby® Digital
Standard DVB / ATSC
SI/PSI insertion all mandatory DVB tables
PSIP insertion all mandatory ATSC tables
Private Data HbbTV (AIT) Table
Teletext ETSI EN 300 472
EPG EIT p/f  |  EIT schedule
   
TS-REMULTIPLEXER (OPTIONAL)
Input sources DVB ASI / IP / RF
Ancillary data automatic PSI and DVB-SI extraction, regeneration and insertion
Table processing adaptation of PIDs, services, tables and descriptors