The leader Allegro DVT has recently released its latest H.264 SVC scalable high-end Level 4.2 compliance test kit, and H.264 MVC stereo high-end Level 4.1 compliant test kit, making these two Emerging, facing full HD content (1080p60 and all HD 3D) can expand video transfer standards with a sound test system. To this end, professional electronic information technology market research institutions Beijing Huaxing Wanbang Management Consulting Co., Ltd. visited this leading company located in Silicon Valley, France.
With the digital audio and video content through digital TV, Internet, mobile communication networks, new mobile phones, PMP, set-top boxes, tablets, Blu-ray players, and tablets, rapid spread, and various HD and 3D formats And standards continue to emerge, in order to ensure that content can be accurately played on different platforms and networks, the importance of digital audio compliance testing is increasing, and there is also a test service and test tool for various standard compliance. need.
"With the wide application of various video standards such as H.264, manufacturers and operators have developed rapidly on the needs of standard compliance tests." Allegro DVT Joint Founder and CEO Pierre Marty told Huaxing Wanbang chief Analyst Liu Zhaohui. "This is because there is a lot of compression technology to achieve new video standards. Although each chip and system developer can be basically similar when developing decoders, different architectures and algorithms are used in design encoders. To improve compression efficiency, you need to comply with the encoder and decoder products. "
The Allegro DVT headquartered in the foot of the Alps November 2003, through focusing on research and development of various video and audio digital compression technologies and actively looking for related special positioning applications, becoming a world leading digital video compliance testing service and test data stream supplier. At present, the company has 25 employees, 22 of which are engineers, and the joint founder Marty has been a product architecture of the ST microelectronic set-top box business unit.
At present, Allegro DVT has developed three product lines including intellectual property (IP) and broadcast products with various compliance test data streams, chip design. More than 70 customers are world-class manufacturers, including Intel, NXP, TI, ST and Broadcom and other chip vendors, NTT and other operators and Siemens, Fujitsu and other equipment manufacturers. Including my country's Haisi semiconductor, the Asia-Pacific manufacturer, such as the exhibition, and the national core account for 40% of its total customers.
The new video and audio standards have brought huge opportunities for the development of Allegro DVT, especially because H.264 and MPEG4 have higher complexity than MPEG-2, so from the initial encoder, decoder chip and system. The beginning of the design has been necessary to perform the necessary tests before the set-top box and digital TV, so that it can prevent extremely expensive, time-firing redesign and invalidation.
To this end, Allegro DVT offers a variety of test kits, each of which combines a subset / application level. The products offered by Allegro DVT include the following verification tools: MPEG-4 and H.264 basic validation data streams, audio / video system level data streams, and high-end forward-looking test data streams. These products apply to different stages of new product development, which will form a complete system test kit when they are used together.
"Test data stream is a set of automatic work test programs, such as our H.264 basic data stream set contains a series of data streams, each of which makes a specific video feature fast and simple Analysis. "Mr. Marty said. "Every step test will be marked, and our reference video decoder software will generate expected decoded images to compare, thereby discovering problems. At the same time, we also provide eliminating error tools and complete reference documents to help designers discover and solve problem."
System-level test data for set-top boxes and digital TVs is more complicated, because digital TV standards in countries are not the same, and the test requirements for system products are also very strict. For example, for digital TV standard DVB-T for Europe, the system data stream provided by Allegro DVT provides static image resolution, audio / video synchronization, image analysis dynamics based on the ETSI TS 101 154 V1.8.1 (2007-07) standard. Variation, video codec dynamic changes, image aspect ratio, dynamic format descriptor, graphic subtitle synchronization, and DVB subtitle synchronization, etc. 8 data streams are tested.
"For a variety of emerging standards for future, we have also launched the corresponding test data stream, which can help designers have developed products." Mr. Mart is summarized. "We have recently launched higher-level data stream products for H.264 and MPEG4 standards to fully meet new developments such as full HD, 3D and adaptive bandwidth, and the latest products include SVCs that support HD mobile video broadcasts. Extending Level 4.2 compliance test data stream, and supports 3DTV stereo Level 4.1 MVC compliance test data stream. "
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Figure 1. Allegro jointly founder and CEO Pierre Marty introduced the company's recently launched 3DTV test data stream
Figure 2, Allegro video test data flow show
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