Articles by Lyn Parcia
A Growing High In High Voltage Power Electronics And Technology Market
A detailed analysis was carried out by Yole development for the technical development and market behaviour of high voltage power electronics. Four industries were specially investigated for their market performance namely the wind turbine converters, rail traction, electricity transportation and distribution (T&D) industry and the ship and vessels industry. Other power industries like the industrial motor drive or the UPS markets were not taken into consideration owing to their volatile nature.
Well, with Kyoto protocol and global warming it is a dream of every country and industry to bring down carbon emission and rely upon some other renewable energy source than the conventional ones. Many governments are encouraging companies and giving them incentives for driving them towards greener energies. These have such great effects that the IGBTs, thyristors and diodes etc are expected to function in 8 inch, wafer like platforms and an increase in use of silicon carbide, a comparatively better degradable material. As of now the companies producing SiC based components face very less competition, because of the lower production and the contracts that have been given for long time periods.
The market matrix of high voltage power electronic devices and modules (usually the IGBTs, thyristors and diodes) is expected to show very high results in 2015. The market which is now a meagre $390 million in 2009 is estimated to escalate to $570 million in 2015. The future expectations the four leading market players namely the rail traction, electricity transport and development, wind power converters and the ship and vessel industry has been enumerated below
Another player which expects about a 11.1% increase in its turnover is the electricity transport and distribution business. HDVC transportation is expecting an exponential increase especially with ABBs input of a light HDVC architecture, the IGBTs.
Next in line is the electricity T&D which stands to benefit from the strongest CAGR from 2010 to 2015. There may be an increase to the tune of 11.1% which is expected to be realized from HDVC transportation. It is hoped that ABB would contribute to HDVC light architecture by making IGBTs.
Ships and vessels have shown varying trends in 2009. Military ships have shown great growth whereas the yatches for private use have declined tremendously. As a result the growth in ship and vessels market is meagre, but does give a promise of growth in future. The IGBT module market for ships and vessels is predicted reach $26 million in 2015.
The technological development and the market of power electronics is gradually increasing day by day for example the cameras, photovoltaic converters white goods etcetera and are giving a brighter shade to future. This has made many leading companies to show higher interest in R&D of more advanced power electronics devices showing an inclination towards greener energies and cost efficiency. We have used the four most promising fields of power electronics which are namely the electricity transportation and distribution, rail traction, wind turbine converters, and the ships and vessels markets. Industrial motor drive or UPS markets have not been considered due their volatile nature.
Analysis of the market of high voltage power electronics and technology gives us an idea of the performance of various industries using high voltage power for their daily operations in a query to find out the future of the market in the sector. It is seen that high voltage devices have been used in gadgets used commonly as the electric vehicles, cameras, photovoltaic inverters etc. Many companies are aiming towards higher R&D in the sphere of providing a low cost high energy device that may rule the market of tomorrow. Hence, there sure would be an increase in the stock values of these users thereby giving better yields.
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Compressing Standards And Multiplexing Tools For Digital Video Broadcasting!
Digital video broadcasting is an evidence of the fact that science has done everything possible and is continuously and consistently striving to make our lives even better. Today, we not want to have machines that support us to make our lives comfortable but we also want to keep the quality of entertainment in our lives at an impeccable level. Today we want to access every television channel of various parts of the world. Thus, having the best quality level of entertainment has become need in our lives, from a once-upon-a-time want. This has happened because we now can have multiplex or a bundle of various TV channels to be broadcast due to digital video broadcasting. The service uses a single radio frequency to broadcast the television channels and services. Digital video broadcasting has enabled various service providers to increase their capacity to make more entertaining programs for a wide variety of audiences around the world.
There are basically two standards used to compress audio and video data for digital video broadcasting. One is MPEG-2 which efficiently compresses various TV channels and services into a bundle. However, now MPEG-2 is superseded by MPEG-4. Its compressing standards for audio AAC and video AVC, work a lot more efficiently that MPEG-2. The comparative analysis of these two standards makes it evident, that MPEG-4 requires as less as half a bit rate than that of MPEG-2 to produce a high quality result. These standards are more defined as protocols, which highlights the fact it can be easily predicted, that there is going be further progress in terms of technology and performance by MPEG-4.
There are various statistical multiplexing methods which can be used to improve the picture quality of the transmission. Normally, each channel is given with a constant bandwidth within which it has to operate, this is known as constant bit rate encoding. But this encoding has been displaying an inefficient performance because it makes the picture quality suffer, at demanding times. Generally, the transmission does not use the entire bandwidth allocated to a particular channel because of huge redundancy in video data.
In order to provide best quality output, another statistical multiplexing tool is employed, which is known as variable bit rate encoding. This tool does allocate a particular bandwidth capacity for a service or channel to operate in but, at times of high demand, the encoding capacity varies so that the service can transmit high quality output. This joint rate control on encoding has two approaches, look ahead and feedback.
It is vital to mention that variable bit rate encoding, when employed with compression standards like MPEG-4, can produce mind-blowing quality of both the sound and video output. It is due to these statistical tools that we are able to get different channels, without making the picture quality suffer. Moreover, with the advent of newer technologies like HDTV series and DVB multiplex, we are in a need to increase the multiplexing capacity of various tools.
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