Xilinx and Barco Silex's latest reference design supports the transmission of JPEG2000 video over an internet protocol network.
Due to its superior picture quality, JPEG 2000 has become the standard of choice for high-definition video compression, including TV broadcaster collection of network video transmissions. Video equipment vendors have therefore begun adding JPEG 2000 encoders/decoders to various transport solutions to support a variety of interfaces and, in some cases, proprietary protocols.
But this trend means that video service providers have only one or a few vendors' products to choose from. With the introduction of the TR-01 Internet Protocol Network Video Transmission Recommendation in the Video Service Forum (VSF) in April 2013 to provide specifications for device interoperability, this dilemma has a solution. Xilinx and its affiliate program member Barco Silex quickly joined forces to support this interoperability specification.
Barco Silex has completed the reference design for the VSF TR-01 Recommendation. This multi-channel JP2000 IP video transmission solution has recently been announced on the Xilinx website. It is based on the IP cores provided by Xilinx and Barco Silex for customization and integration by broadcast equipment OEMs. In view of the contribution of Barco Silex, the NaTIonal Academy of Television Arts and Sciences awarded Barco Silex the 2014 Technology and Engineering Emmy Award (see Figure 1).
Figure 1 - Barco Silex video team responsible for reference design is standardized and mass-produced for JPEG 2000 interoperability 2014
Year of Technology and Engineering Emmy Awards. From left to right: Luc Ploumhans, Sake Buwalda, François Marsin, Jean-François Marbehant, Jean-Marie Cloquet and Vincent Cousin.
Seeking first-class video compression
JPEG 2000 replaces the old JPEG standard and offers many advantages over its predecessor or other common formats such as MPEG. In 2004, JPEG2000 became the de facto standard for digital cinema image compression through the requirements of the Hollywood Digital Cinema Initiative (DCI) specification. With image quality lossless compression, JPEG2000 is ideal for security, archiving and medical applications.
The broadcast industry is also concerned about this. Broadcast and video services companies have a large amount of live video that needs to be transmitted to post-production and streaming facilities (Figure 2) through their so-called contribuTIon network, requiring no delay and no loss of quality. Therefore, the professional video industry is particularly interested in the lossless compression of image quality. That is, the compression scheme needs to maintain image quality while achieving efficient storage and transmission.
Figure 2 - Broadcasting company's program collection network
In addition, other innovations in JPEG2000 also mean a leap in the broadcast industry. Unlike MPEG, which compresses frames into groups of frames, each frame in a JPEG2000 video stream is individually compressed into a still frame. This single-frame compression technology enables low latency and post-frame processing and editing. JPEG2000 video streams can also be partially decompressed and viewed, allowing different applications and different viewing experiences with the same video stream.
Another big advantage is the strong transmission tolerance of the video stream. Compared to other codecs, even if forward error correction (FEC) cannot be used to correct transmission errors, these errors have a very small effect on the picture quality after decoding. Finally, JPEG2000 retains the original image quality after multiple encoding/decoding processes, which is important for a program collection network with multiple video management stages.
In response to this demand, device vendors quickly started the implementation of the JPEG2000 encoder/decoder on their own video equipment. However, there are still many implementation options available for transmission between different locations, such as proprietary protocols. The downside for video service providers is that they have to choose between one or several vendors' products rather than building the best-matched, cost-effective infrastructure.
The video transmission standardization proposal therefore provides a clear transport standardization requirement for service providers to ensure better interoperability between existing and future devices. What they need is a transport technology that can be ideally organized over IP networks, as IP networks are becoming mainstream network architectures that provide standardized equipment ready for high-throughput data transmission. Since 2007, the Society of Motion Picture and Television Engineers (SMPTE) has published standards for IP video transmission and has continued to improve since then. SMPTE 2022 includes an IP protocol for constant bit rate video signals in MPEG-2 transport streams (SMPTE 2022 1&2 for compressed video; and SMPTE 20225&6 for uncompressed video).
Based on these standards, the Video Services Forum released the VSF TR-01 document in 2013, the Recommendation for JPEG 2000 Broadcast Profile Video Transmission for IP-Based MPEG-2 TS. VSF is an international consortium of service providers, users and manufacturers dedicated to developing interoperability, quality metrics and training in video networking technologies.
Any device that complies with VSF TR-01 will receive input signals from SDI (Serial Digital Interface), which is an established standard for uncompressed point-to-point video transmission in the broadcast industry. The device will extract valid video, audio and auxiliary data (such as subtitles) and then compress the video into JPEG 2000 format. The resulting video stream is multiplexed with audio data and auxiliary data into an MPEG-2 transport stream. The transport stream is then encapsulated into a Real-Time Transport Protocol (RTP) stream by SMTPE 2022 and sent to the receiving device over IP. The receiver decapsulates the RTP/IP stream, demultiplexes the MPEG-2 transport stream, decodes JPEG 2000, and then outputs the video, audio, and auxiliary data as SDI signals.
Implement an FPGA-based reference solution
In September 2012, just prior to the release of the VSF Recommendation, Xilinx and Barco Silex announced a partnership to develop an IP video transmission solution designed to provide hardware-proven IP cores, reference designs and system integration services. A comprehensive platform within. In collaboration, Barco Silex acts as a system integrator, matching the Xilinx-provided cores (SMPTE 2022, SMPTE SDI, Ethernet MAC) with their high-performance JPEG 2000 and DDR3 memory controller cores. The goal is to enable broadcast equipment OEMs to accelerate product development and add state-of-the-art IP video transport capabilities to existing and developing products.
Within this framework, partners have now completed a reference design consisting of a four-channel transmitter-receiver platform (Figure 3). The transmitter can receive four SDI High Definition (HD) streams (1080p30), optionally compressed with JPEG 2000, and then transmitted over 1Gbps (compressed) or 10Gbps (uncompressed) Ethernet according to the VSF TR-01 standard. The receiver platform is responsible for receiving the IP stream, decapsulating and decompressing it, and then sending the signal to the four-way SDI HD link.
On the transmitter platform, the Xilinx SMPTE SDI core receives the incoming SDI video stream. On an uncompressed path, these SDI streams are first multiplexed by the Xilinx SMPTE 2022-5/6 IP video transport transmitter core and packaged into fixed-size datagrams, then passed through Xilinx 10Gb Ethernet The MAC (10GEMAC) and 10G PCS/PMA cores are sent out.
On the compressed path, the SDI stream first enters the JPEG 2000 encoder to complete the compression. They are then packaged as MPEG-2 transport streams in accordance with VSF TR-01, a dedicated TS engine core designed by BarcoSilex. Finally, the SMPTE 2022-1/2 IP Video Transport Transmitter core packs these streams into fixed-size datagrams and sends them out through 1GTEMAC. In addition, the compressed stream can also be multiplexed with uncompressed video on a 10Gb link using 10GEMAC and 10G PCS/PMA cores.
On the receiver platform, the Ethernet datagram of the uncompressed stream is collected on the 10GEMAC, and then the SMPTE 2022-5/6 IP video transmission receiver core filters the datagram, decapsulates, demultiplexes it into a separate stream, and passes SMPTE. The SDI core outputs SDI video. The Ethernet data of the compressed video stream is collected on 10GEMAC, then decapsulated by the SMPTE 2022-1/2 IP video transport receiver core and TS engine, and fed to the JPEG 2000 decoder. The video output from the decoder is converted to SDI and sent to the SMPTE SDI core.
For each of the four channels, it is possible to select whether it is a compressed path or an uncompressed path independently of the other channels.
Laying the foundation for interoperability solutions The two companies implemented the reference design on two different platforms, one using the Zynq®-7000 All Programmable SoC and the other using the Kintex®-7 FPGA. However, the modules used can be integrated into a variety of solutions to meet the full range of OEM system requirements from low-cost, high-volume applications to the most demanding high-performance applications. The IP cores used (such as the Xilinx SMPTE 2022) and the Ethernet MAC LogiCORETM module can be used in a full range of Xilinx FPGA systems up to the UltraScale level.
In terms of encoding/decoding, the reference design uses Barco Silex's JPEG 2000 encoder/decoder IP core. These IPs are hardware-proven, single-chip FPGA solutions for high-performance simultaneous multi-channel 720p30/60, 1080i, 1080p30/60, and 2K/4K/8K JPEG 2000 encoding/decoding. These cores also support the widest variety of JPEG 2000 options available on the market today. A key player in the splicing of multiple video streams into a smooth high data rate system is the DDR memory controller from Barco Silex. This highly customizable controller is optimized for high bandwidth, reordering access, mixing and sending to different banks of SDRAM.
The two companies presented the first generation of the reference design in a public interoperability demonstration at the annual VidTrans conference in Arlington, Virginia, in February 2014. In this VSF organization's test, technologies and devices from 10 companies (Artel, Barco Silex, Ericsson, Evertz, Imagine CommunicaTIons, IntoPIX, Media Links, Macnica, Nevion, and Xilinx) were linked together to demonstrate the use of JPEG The 2000 encoder and decoder compress 720p30 and 1080i60 HD content in real time and transmit it in real time.
A few months later, Barco Silex demonstrated that the reference design already has the ability to handle 4K and Ultra High Definition (UHD) signals. As one of the main standards recommended for next-generation video distribution, 4K video can carry up to four times as many pixels as 1080p video, further enhancing image resolution and using larger video displays. Using the four input channels of the reference design in four SDI mode (4K over four SDI cables), you can enter 4K signals and transmit 4K signals over an IP network. This reference design can be used for video resolutions up to 4K.
FPGA Drives Video Industry The partnership between Xilinx and video specialist Barco Silex aims to leverage the power and flexibility of an FPGA-based platform in the professional video market. By combining Barco's JPEG 2000 core with Xilinx's transport core, OEMs can quickly produce and update standardized broadcast equipment to meet their future needs in terms of process.
The IP network application in the video industry is on the rise, and the introduction of the reference design is just the right time. Whether OEMs can take a share in emerging markets depends on the speed at which their products go on the market. With Xilinx FPGA-based reprogrammable solutions, they are able to bring products to market as standards evolve.
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