Tag: CPU TS MPEG decoding
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At present, most countries and regions in the world have set a timetable for digital TV implementation, and the popularity of digital TV is irreversible. The world's major digital TV standards include ATSC represented by the United States, DVB-T represented by Europe, ISDB-T of Japan, China's terrestrial digital TV broadcasting standard DMB-TH and cable network digital television DVB announced last August. -C and satellite digital TV DVB-S.
From different angles, digital TV can be classified as follows: 1. Classification by signal transmission: It can be divided into terrestrial wireless transmission (terrestrial digital TV), satellite transmission (satellite digital TV), and cable transmission (cable digital TV). . 2. Classified by product type: can be divided into digital TV display, digital TV set-top box, integrated digital TV receiver. 3. Classification by definition: can be divided into low-definition digital TV (image horizontal resolution greater than 250 lines), standard definition digital TV (image horizontal resolution greater than 500 lines), high-definition digital television (image horizontal definition) More than 800 lines, ie HDTV).
At present, in the field of digital TV, main CPU, transmission code stream (TS) demultiplexing, MPEG decoding, analog color demodulation, video signal processing, image display processing and other functions can be integrated into one chip, and even digital TV signal demodulation Decoding, analog TV signal demodulation, HDMI reception, analog component video signal (YPrPb) / RGB reception, audio signal decoding can also be integrated into a single chip, and the chip process can reach 90 nanometers, or even 65 nanometer technology level. In addition to basic digital TV capabilities, HD digital TVs will be integrated into more functional interfaces such as USB, SMART Card, 1394/iLINK, SATA, network interfaces and H.264/VC1 decoding.
There are about 5-7 major chips in each digital TV. The main chips include digital signal tuning, digital signal demodulation, MPEG decoding, back-end image processing and memory. These chips can all be located in digital TV sets (digital TV all-in-ones) or in digital TV set-top boxes and TV sets.
Figure 1 is a block diagram of the digital TV all-in-one machine. We will introduce you to the major manufacturers in all fields of digital TV.
1. Tuner: The tuner is not an IC, but a module, usually a tin box (CAN) package, commonly known as a tuner. At the end of 2004, the industry developed a silicon tuner to replace the iron box package. The mainstream of tuner products. Different digital TV standards require different sizes of tuners. The main manufacturers in this field are Microtune, Anadigics, ALPS, Xceive, Freescale, and RF Magic. While ST is the main tuner for set-top box, Broadcom is the tuner for satellite TV.
2. Demodulator, which is the most technical part, with a high threshold. There are also manufacturers that package the tuner and demodulation chip into a single module, but a separate demodulator is still mainstream. Major players in this field include Intel, DiBcom, Frontier Silicon, NXP, Dibcom, Siano, and Samsung.
Intel acquired the technology in October 2005 when it acquired the UK wireless front-end consumer electronics business segment of Zarlink Canada. Intel is recognized as a leading manufacturer in this field.
DiBcom is a French manufacturer specializing in the demodulation of mobile DVB-T signals, that is, mobile TV DVB-H, DiBcom technology has rich experience in high-speed calculus, channel judgment architecture, and Doppler compensation. Has a number of patented technologies. Most of its products are used in the automotive environment, and the signal receiving capability is excellent for high-speed driving. Not only has the advantage of low power consumption, even if the speed exceeds 100 inches per hour, it can stably receive signals.
3. MPEG decoding of digital television. Currently mainly MPEG-2 decoding, MPEG-4 and H.264 decoding will soon be added. The MPEG-2 decoding for digital TV and the MPEG-2 decoding for DVD players are not much different, but the performance of digital TV is better, the operation rate is higher, and the cache is larger. DVD players are currently mostly single-chip designs, and MPEG-2 decoding of digital TVs is basically a separate one.
STMicroelectronics is the strongest manufacturer in the field of MPEG decoding. In 1995, it launched the world's first MPEG-2 decoder chip. The technical threshold of MPEG decoder chip is not high, the key is cost control problem, and the key to cost control is integration. STMicroelectronics is the most successful in this respect, and has launched 65 nm MPEG-2 decoding samples.
There are few MPEG-2 vendors alone, and the current trend is to integrate MPEG-2 decoding into TV control ICs. Independent MPEG-2 decoding ICs are mainly targeted at the set-top box market. Manufacturers in this field include STMicroelectronics, ATI and Zoran in the US, Fujitsu in Japan, Leda in China, Sunplus, and Haier in mainland China.
4. Display the processing chip IC. Almost all Japanese manufacturers in the field have completed their own chip development. The companies that supply this chip to other manufacturers besides Japanese manufacturers include Gnesis, Pixelworks, Trident, STMicroelectronics, Micronas, Toshiba, NXP, ATI, Morningstar and MediaTek.
5. Power management chip. Semiconductor manufacturers in this field include Fairchild, Intersil, NXP, ON Semiconductor, TI, Angbao and so on.
Figure 2 reflects the composition of the entire digital TV industry. In the industry chain, there are chip suppliers such as ST, TI, and NXP that provide digital TV chips, along with software vendors that provide services to these chip companies, such as Esmertec. These chip suppliers are likely to provide chips to OEMs of digital TV set-top boxes or all-in-ones, and are more likely to provide services from software companies and their own chips as solutions to OEMs.
Chip manufacturers will also provide their products to distributors or a large number of third-party design companies in the above two forms, and then provide them to OEMs after adding value, and finally end users through digital TV set-top boxes produced by OEMs. Or the all-in-one enjoys a variety of digital TV programs offered by content providers and service providers. In each field, there are some unique companies active, and we will introduce you one by one.
1. Chip provider mainly
ST
STMicroelectronics' high-definition digital TV solutions include digital TV receiver embedded solutions and single-chip solutions. The product line includes digital demodulator, video signal processor, tuner, peripheral function ICs and audio/video switches.
In the digital TV receiving embedded solution, the digital integrated tuner includes digital radio frequency tuning and channel decoding, and demodulates and outputs the standard MPEG transmission stream signal from the received digital television radio frequency signal. The MPEG code stream without special encryption is directly input into the ST digital TV signal decoding chip for processing; for the specially encrypted MPEG code stream, first input to the CI card loop for decryption, and then the code stream is directly input into the ST digital TV signal decoding system chip. Process it. Through the MPEG decoding and signal encoding of the ST digital TV signal decoding system chip, the AD conversion outputs analog YPRPB and stereo audio signals, and displays the digital television image to the existing analog television system, thereby forming a complete liquid crystal high definition digital television.
ST digital TV single chip system chip and attached FLASH/DDR SDRAM memory, peripheral digital-analog integrated tuner, analog switch chip, HDMI/YPrPb/VGA input processing chip, LCD screen, sound processing chip, audio amplifier circuit, speaker , CI card circuit, and keyboard / remote control reception, together form a liquid crystal high-definition digital TV receiving system.
TI
As the main advocate of DLP technology, TI's product line is mainly based on video decoders. In addition to conventional digital TV chips, TI also has a single-chip mobile digital TV solution called Hollywood. Hollywood includes two chips: the DTV1000 and the DTV1001 chip. The DTV1000 supports DVB-H with an operating frequency range of 470-750MHz (UHF) and 1.670-1.675GHz (L-band). The DTV1001 supports ISDB-T "one-segment" with an operating frequency range of 470-770MHz. Both have a minimum footprint of less than 1cm2, which saves more board space than a separate solution for tuner, demodulator and external memory. The DTV100X supports video elementary stream transmission of multiple parallel TV channels with a channel switching time of less than 1.5 seconds.
NXP
Philips is one of the leading players in the TV field in the analog TV era. NXP, which was born out of the Philips chip division, has deep technical accumulation in the digital TV field, has a broad product line, and has corresponding solutions for high-end and low-end markets. Its single-chip solution TV210D enables 50-60Hz CRT TVs to also receive digital signals. The chip also provides dynamic picture management to achieve excellent picture. There is a TV505D reference design for the DVB-T market. For the ATSC market, there is a mid-range integrated solution TV810 based on its NEXPERIA processor and a mainstream integrated LCD TV solution TV520.
ATI
ATI can provide digital TV set-top box chips of various standards, as well as digital TV integrated machine chips, as well as digital TV tuners. ATI introduced the Xilleon series of digital TV chips. The Xilleon226 is ATI's third-generation digital TV chip, which includes a 300MHz CPU, dual HD decoder, dual audio decoding, multi-standard CA support, and support for USB/EIDE/Serial/IR/PCI interfaces. The Xilleon 210VC is equipped with decoding functions such as ATSC, QAM and NTSC signals, conditional access (CA), demultiplexer, scan line conversion, IP conversion, and 2- and 3-dimensional graphics processing for displaying menus. The Xilleon 210H is a DVB high-definition digital TV chip, and the Xilleon 210D is a DVB standard-definition digital TV chip. The Xilleon 240S/H is an ideal low-cost ATSC digital TV chip that still supports NTSC analog signal input with HD or SD MPEG-2 decoding. The higher-end Xilleon has the fastest processing speed of 500M-600Mhz CPU, storage bandwidth up to 5GB / S, supports worldwide analog video and audio signals (NTSC, PAL), and further supports USB2.0 interface and SD card and memory Baton. ATI also offers front-end demodulators for digital TV, including THEATER 313/310 and NXT2003/2004.
MTK
MediaTek has launched digital TV chips that comply with US regulations and European regulations. It mainly provides HDMI, MPEG decoders and image processing chips, and is shipped with De-Modulator and Tuner from other chip manufacturers. In addition, MediaTek will introduce higher integration. The digital TV single chip further integrates the MPEG2 Decoder and the De-Modulator with the TV Controller, and only the Tuner plug-in is left. The biggest feature of MediaTek is that it not only provides a digital TV chip but also a Turn key solution, which is welcomed by many OEMs.
Genesis
Genesis' PÅ«rVIEW HD Series DTV controllers offer a flexible, cost-effective solution. It is mainly for countries and regions adopting ATSC/DVB standard, providing MPEG-2 decoding, supporting other audio such as Dolby Surround (AC3), MP3, etc. The output resolution can support WUXGA/1080P.
Trident
Trident is the industry's leading provider of digital TV processing SOC chips. Recently, Trident introduced the fifth generation digital video processing SOC chip - SVP EX and HiDTV chip for HDTV system. Its latest TV-Master is a highly integrated, high-speed USB 2.0 convenient and convenient TV image capture device that provides a low-cost solution for watching TV on a PC or laptop. The TV-Master single IC integrates a two-channel 16-bit audio ADC, two-channel 10Bit, 2D comb filter high-performance video decoders and an embedded MCU.
Pixelworks
Pixelworks is a semiconductor company that provides system-on-chip and software for digital TV manufacturers. It integrates a microprocessor, memory and image processor on the SOC chip to achieve high quality display by optimizing and processing the video signal. It has a core TV technology called DNX (Digital Natural Expression) that typically enhances the quality of video images for crisp, natural and high-definition images. The technology includes motion adaptive deinterlacing algorithms, pixel enhancement, rich color processing, video image enhancement, digital noise reduction, precision zoom digital deflection control, and more. Its media processing chip series includes PWM2000, PWM2020 and PWM2030.
Zoran
A company with strong growth in the field of digital TV, its expertise lies in the continuous innovation of digital set-top box products through comprehensive platform reference design, comprehensive software and professional support team. Its SupraTV processor is used in digital set-top boxes for many manufacturers, while the SupraHD processor is used in digital TV products from many well-known brands.
Hittite
Hittite is an audio and video codec chip design company based in Beijing, China. Its CC1100 SoC integrates a 350MHz RISC processor, a 256-bit vector processor, a Motion Estimation engine and an Entropy engine programmable module, and a DDRII-667 controller with DAC, PCI-E, SATA, USB2.0 OTG and Peripheral interface such as SDIO. It supports encoding, decoding and transcoding of multiple video formats such as MPEG-2, H.264, MPEG-4.2, VC-1, RM, Flash and MJEPG.
Vivace
Vivace is working hard to create high-performance chips that meet the high standards of media processors through a combination of custom processors, highly integrated firmware, and silicon-proven IP. The core chip can support multiple video compression standards including H264/MPEG4 AVC, MPEG4 ASP, Windows Media 9, MPEG2 and VC-1 and many other technologies including AES, DES, 3-DES and DVB CSA. Kind of decoding standard. Its VSP300 chip is the ideal device for the next generation of high-definition integrated digital TV. High-performance solutions integrate high-quality video into the platform to support wireless access to high-definition streams. The VSP300 supports multiple data standards and digital rights management standards (DRM) and has a complete library of applications. The VSP300 runs Linux and Windows CE operating systems with a complete development environment.
2. Third-party design company:
With the further refinement of the industrial division of labor, and the multi-faceted consideration of cost and product speed, a number of third-party design companies are active in the digital TV field. For example, Shenzhen Innor Technology Co., Ltd. is a third-party design company based on TI, Zoran, ST, and Philips chips for digital TV system design. Beijing Times Feiteng Technology Co., Ltd. is also a third-party design company active in the field. Its predecessor was Beijing Changxinjia Industrial Co., Ltd., an application design and development company affiliated with TI. Time Jett has applied the solution based on TI's DaVinci platform. In the high-definition TV of Skyworth Group. Shanghai Panorama Digital Technology Co., Ltd. is another design company that develops HDTV solutions based on TI chips.
Distributor:
Coton Communications represents Broadcom's set-top box chip. World Union's Shi Ping is the agent of NXP's silicon tuner, while Arrow and Avnet represent ST's digital TV chip. Some distributors will also introduce their own solutions related to component applications while promoting components to promote component sales and expand their product lines. For example, Shijian System has a digital TV solution based on Pixworks.
3.OEM
Skyworth, Konka, Changhong, TCL and other enterprises are the representatives. They produced a large number of digital TV set-top boxes, and are actively working with the card separation solution providers to launch digital TV integrated machines. National Micro-Semiconductor Co., Ltd. can provide CAM cards that comply with the DTV-CI standard, and at the same time develop an all-in-one module that is compatible with the CSI technology.
Finally, it is worth mentioning that a number of local chip companies have emerged in the digital TV field. They include Tongzhou Electronics, Hangzhou Guoxin, Qicode Technology, Fudan Weiner, Lingxun Technology, Hisilicon Semiconductor, and Beijing Haier.
Looking forward to the future, the digitization of radio and television is more than just the replacement of set-top boxes. From the current development situation, "two-way, interactive and integration with the Internet" has become the main trend of the market and products. Whether it's the old ST of the set-top box, the new ATI from the IT field, or the Zoran from the medium-sized design company to the big company, their products are accompanied by higher image clarity and more media interfaces. Better interactive features and better network communication capabilities. Driven by these technology providers and related service providers, digital TV can not only bring more clearer programs to consumers, but also provide consumers with a personalized and interactive home multimedia information platform. Service providers are also able to truly understand the needs of different consumer groups through this interactive platform with the highest coverage, and provide the greatest possible business opportunities for different groups of people.
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