VC-7700 Series Digital Video Compression and Transmission System by NEC
NEC Corporation Introduced today the a new digital video compression and transmission system, VC-7700, which provides one of the lowest video compression delay times in the industry, suitable for communications between shooting locations and live broadcasting studios.
The new VC-7700 series transmission and video compression system has ten milliseconds video compression delay for broadcast operators and telecom carriers. The product will start shipping in Japan from October, 2010. NEC is expecting to sell two thousand systems within the next three years.
Digital terrestrial broadcasting has recently expanded, with the video content shifting to high definition, which means that the demand to reduce the delay of the video compression has increased.
The NEC VC-7700 series are able to compress large volume high-definition video signals from, after which it transmits the data to the broadcasting centers. The encoding algorithm of NEC reduces this delay time to ten milliseconds, making real time video transmission possible.
VC-7700 series Features:
- 1. One of the industry’s lowest video compression delay times, 10msec
NEC developed an “ultra high quality and ultra low delay encoding algorithm” based on original video compression technologies cultivated through digital broadcasting systems (MPEG-2 encoding). By adopting this algorithm, delay is minimized to 10 msec in ultra low delay mode and 60 msec in low delay mode (*3).
- 2. High quality video through low bit rate transmission
NEC adopted the “H.264 High422profile@LEVEL4.1” video compression method, which provides more than double the compression rate when compared to MPEG-2. By combining this with the “ultra high quality and ultra low delay encoding algorithm,” high quality video can be implemented through low bit rate transmissions.
- 3. Transmission of ancillary data signals
In addition to video signals, ancillary data signals can be transmitted, such as digital subtitle data and control signals between broadcasting stations, which removes the need for additional equipment associated with these signals.
- 4. Support for a variety of audio compression and transmission methods
The VC-7700 series supports a variety of audio compression methods such as MPEG-2 AAC-LC, MPEG-2-BC, MPEG-1 Layer2 and non-compressed LPCM. For video output, transmission interface such as DVB-ASI and IP can be selected depending on the transmission network.