First we should explain what is called HD player:
In a broad sense, a high-definition player refers to all devices capable of playing high-definition video, including a Blu-ray player, an HDDVD player, an HTPC (abbreviation of Home TheaterPersonalComputer, a home theater computer), a hard disk HD player, and the like. In a narrow sense, we often refer to the hard disk HD player as a high-definition player.
HDD HD players generally refer to electronic playback devices that can play 720P or even 1080P HD video on a hard disk or flash storage medium. This kind of high-definition player often has the functions of picture browsing, audio playing, network downloading, etc. It has the characteristics of small size and convenient use. This article also refers to this type of hard disk HD player.
Before purchasing a high-definition player, let's first find out that our TV does not support HD. On TV, we can divide it into CRT TV (traditional TV), flat-panel TV, and flat-panel TV can be divided into LCD TV, plasma. TV. In these TVs, CRT TVs can't support HD specifications, so HD players can be used on CRT TVs, but they feel a bit like killing chickens. This part of the user only needs to buy mainstream 100-300 blocks. The RMVB player around the money can also enjoy a clearer playback. So in the LCD TV, the current 40-inch LCD can basically support 1080P (some older models may not support 1080P), 40-inch or less can also support 720P, especially in the past two years, many 40-inch or less LCD TVs can also support 1080P. You only need to find the relevant models on the Internet to find out if your TV can support 1080P. In plasma TVs, due to the inherent weakness of resolution, a large part of plasma TVs still Can not support 1080P, but 720P is still no problem. In short, the problem of this resolution must be determined through online search related information.
TV has developed LCD backlighting, and now 40-inch LCD can basically support 1080P.
After learning about our TV, we should first come to know about our HD video related parameters, because these are directly related to the convenience and speed of our resources.
720p, 1080i, 1080p: Here the number 720 means that the picture resolution is 1280×720 (horizontal 1280 pixels, vertical 720 pixels), and the number 1080 means the picture resolution is 1920×1080 (horizontal 1920 pixels, vertical 1080) Pixels). The letters i and p, respectively, and Interlaced and Progressive. In terms of definition, it is 1080p>720p>1080i. This is related to their two scanning methods. Generally speaking, a 1080P movie is usually above 8G, some even up to 3, 40G, and 720P movies are mostly around 4-6G.
HD encoding: For high-definition video, mainstream technologies currently mainly include MPEG-2, Divx, Xvid, H.264 and VC-1. Among them, MPEG-2, H.264 and VC-1 are the three encoding formats selected by HD-DVD (which has been discontinued) and Blu-ray DVD, and are therefore the most popular.
MPEG-2 was developed by the Moving Picture Experts Group of MPEG (Moving Picture Experts Group), which was established by the International Organization for Standardization (ISO) in 1988 to develop a working group on motion compression coding standards. The standard is an international standard, and the DVD is MPEG-2 encoding, with the improvement of technology, it has also been applied in high-definition video. The biggest drawback of MPEG-2 is that the file size is too large, but it also has the advantage that it consumes the least amount of system resources compared to the other two codes. However, with the development of hardware, the decoding of H.264 and VC-1 will inevitably become a DVD, and any mainstream configuration can be played smoothly. At that time, MPEG-2 has no advantage.
H.264 is perhaps the most promising of the three formats, and its compression efficiency is the highest of the three codes. The H.264 standard is jointly published by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) and the International Organization for Standardization/International Electrotechnical Commission (ISO/IEC), so H.264 has two names, one is to follow the ITU-T organization. The H.26x name is called "H.264" and the other is AVC (Advanced Video Coding). The biggest feature of the H.264 format is that it can control the file size to one-half or even one-third of the MPEG-2 format while maintaining picture quality. Therefore, its higher compression ratio, better IP and wireless network channel adaptability are more and more widely used in the field of digital video communication and storage. However, it should be noted that the cost of obtaining superior performance of H.264 is an increase in computational complexity, so the hardware requirements of H.264 are the highest.
VC-1 is VideoCodecOne, which originated from Microsoft's Windows Media Video 9. VC-1 is the last recognized HD encoding standard format after MPEG-2TS and H.264. Compared with MPEG-2TS, VC-1 has a higher compression ratio, but compared to H.264, the encoding and decoding calculation is much simpler, which is equivalent to the balance between MPEG-2TS and H.264. VC-1 is now finally written into the support specification by Blue-ray.
AVI: The most common video packaging format, compatible with various video encodings. Currently there are 1080p resolution AVI files, which were first developed by Microsoft. The interactive storage method is the biggest feature of this format. Of course, as a kind of 1992 The shortcomings of the video packaging format that came out are more prominent, that is, the volume is large, the same movie, AVI and MPEG-2 file size is almost the same.
WMV: WMV has two standards, here is the WMV-HD format, based on WMV9 HD encoding, compared with several other package formats, the openness is slightly worse, but Microsoft's promotion is not to be underestimated. It claims to be able to restore 1080p signals without loss, but the hardware requirements are higher, and the packaging of H.264 files is more common.
TS: One of the most popular package formats for network downloading. MPEG-2 or VC-1 codes can be packaged. It is a package format commonly used for Blu-ray and Full HD video. It is large in size, but the video quality is similar and the restoration is accurate. It is a favorite format for HD enthusiasts. You can also pay attention to this in the download. The video quality ending in .TS is very high.
MKV: MKV is the purest “packaged†format compared to the previous package formats. MKV files simply integrate other video streams and sounds, subtitles and other files into one MKV file, although there is no obvious difference in image quality and compression. The advantage, but MKV can build more than 16 tracks, subtitles support more than 16 subtitles, similar to the previous DVD discs, is also a hotter format recently, but limited by the size of the file, the current 1080p resolution MKV files are still relatively small.
RMVB: RMVB breaks the average bit rate of compression and reduces the bit rate under static picture to optimize the bit rate, improve efficiency and save resources in the whole movie. Generally speaking, a 700MB DVDrip adopts the average bit rate. For a compression ratio of 450 Kbps, the generated RMVB size is only 400 MB, but the picture quality does not change much. This technology has been applied as early as MP3, and now with the launch of Real's HelixProducer9, it is also applied to the video field. In recent years, RMVB has developed rapidly in HD. The standard 1024*576 SD has already been realized, and the 720P RMVB has also been developed. Therefore, some RMVB players that support SD are good choices for traditional CRT TVs. Because after all, the resources of RMVB are really rich.
After reading the related concepts of video, we turned to the hardware chip of the high-definition player, because the decoding of a high-definition player is realized by this chip, so that this chip determines whether it can support the recognition of 1080P video, Decoding, output, etc.
The core components of today's high-definition players are mainly decoder chips mainly designed and produced by European, American and Taiwanese manufacturers. The mainstream products in the market include Sigma, Realtek, Mstar, etc. Other products such as Boardcom and INTEL are relatively rare. Among them, Sigma is the first manufacturer to introduce high-definition video decoding solutions. Realtek is a rising star of full-featured solutions. Mstar is a veteran TV chip manufacturer. Today, HD solutions embedded in LCD TVs are mostly from this home.
Among the mainstream solutions in the market, there are mainly 8635 of Sigma, 1073 of Realtek, and MST6M68 of Mstar.
Sigma8635 solution: Support 1080P full HD output, better support for mainstream HD video encoding and format, support DTS source output, do not support RM\RMVB mainstream network format, support network function (harder to achieve in China).
Realtek1073 solution: Support 1080P full HD output, support mainstream HD video encoding and format, support DTS decoding, support RM\RMVB network video format, support network download, LAN sharing function.
Mstar6M68, support 1080P full HD output, but can not support VC-1 encoded high-definition video, most audio can not be supported, so there will be mime phenomenon during playback. However, it can support 720P RMVB video, which is really suitable for national conditions, so it has also been adopted by a large number of TV manufacturers.
In some new schemes, we can also see more powerful schemes, such as Sigma8654, 8655 and Realtek1283. The products of these schemes are very rare, but generally speaking, it is more than the previous schemes in processing speed, DTS and other audio decoding, data. Provides more robust performance on the transmission. For example, Realtek1283 not only has a strong 1073 in decoding, but also can record. It is a very household product.
After reading the chip category, let's take another look at the very important content, that is, the interface of the high-definition player. After the video and audio are decoded by the chip, it is output through these interfaces to the TV and audio system. So, we can't ignore these interfaces. There are many things that often affect you.
In terms of video: Our common interfaces are HDMI, AV terminal, color difference terminal, VGA, etc. In audio, HDMI, AV terminal, coaxial, optical fiber, etc. are commonly used.
HDMI: The full name of English is "HighDefinitionMultimedia", which means high-definition multimedia interface. The HDMI interface provides up to 5 Gbps of data transmission bandwidth for uncompressed audio signals and high-resolution video signals. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission, which can ensure the highest quality video signal transmission. The advantage of using HDMI is that only one HDMI cable is needed to transmit video signals at the same time, instead of requiring multiple wires to connect at the same time; at the same time, higher audio can be achieved due to wireless digital/analog or analog/digital conversion. And video transmission quality. For consumers, HDMI technology not only provides clear picture quality, but also greatly simplifies the installation of home theater systems due to the same cable for audio/video.
The VGA terminal is also called the D-Sub interface. VGA interface is the most widely used interface type on video cards. Today, fewer HD players use this interface. The VGA interface still transmits analog signals. It works well on CRT TVs or monitors. It displays digitally on LCDs. The effect on the device will have a slight effect, but the impact is not great.
Color difference terminal: Based on the S terminal, the blue difference (b) and the red difference (r) in the chrominance (C) signal are transmitted separately, and the resolution can reach 600 lines or more. It usually uses two symbols, YPbPr and YCbCr, the former represents the progressive scan color difference output, and the latter represents the interlaced color difference output. Nowadays, many TV products rely on the color difference input to improve the quality of the input signal. In the interface of the analog signal, the color difference terminal is one of the best.
AV composite terminal: It is a video terminal with separate sound and picture. It is usually composed of three independent RCA plugs (also known as plum interface RCA terminals). The V interface is connected to the mixed video signal and is a yellow socket. The L interface is connected to the left. The channel sound signal is a white socket; the R interface is connected to the right channel sound signal, which is a red socket. However, since it is an analog interface, when used in a digital display device, a process of analog to digital is required, which will lose a lot of signal-to-noise ratio. In addition, the quality of the wire can obviously affect the effect, so the general digital display device is not recommended. use.
Optical fiber: A digital signal is transmitted in the form of a light pulse, and its material is mainly glass or plexiglass. The fiber also uses the S/PDIF interface output, which has high bandwidth and low signal attenuation. It is often used to connect DVD players and AV amplifiers, and supports PCM digital audio signals, Dolby and DTS audio signals.
Coaxial: An interface that outputs digital audio using the S/PDIF interface. The coaxial cable has two concentric conductors, and the conductor and the shield share the same axis. The coaxial cable is a copper wire conductor isolated by an insulating material with an impedance of 75 ohms. On the outside of the inner insulating material is another layer of ring conductor and its insulator. The entire cable is sheathed of polyvinyl chloride or Teflon material. Wrap it up. The advantage of the coaxial cable is that the impedance is stable and the transmission bandwidth is high, which ensures the quality of the audio. Although the standard connector of the coaxial digital cable is a BNC connector, the coaxial digital wire on the market mostly uses an RCA connector.
After understanding the related concepts of video and audio and the hardware of the HD player, we can know how to choose a high-definition player. If your TV supports 1080P, then the chip will be Sigma8635 or Realtek1073 program. If you are using full HD projection, Sigma8635 will better satisfy your appetite, but most of the mainstream is still based on 1073, the price is cheap. Powerful and able to support RMVB, this is indeed a small temptation in China. If your TV can only support 720P, then MSTAR's solution can satisfy you, and most of the decoder chips built into TV are now out of this factory.
If you want to set up a sound system to meet your viewing needs, then decoding DTS audio is essential, then Realtek1073 will be your choice for the time being, of course, you can also choose the more powerful SIGMA8654 products, but these The products are very small and expensive.
5.1 sound, plus DTS effect, cool words?
As for the price and workmanship of HD players, the price of the Sigma8635 program will generally be more than 1,000 yuan. The price of the Realtek1073 program will be less than 1,000 yuan, most of which will be concentrated in the 899 segment. As for Mstar's solution, it is cheaper, and there will be transactions at around 500 yuan. In terms of workmanship, the current high-definition players are generally able to meet the relevant standards, plus products that are not always in contact, there is no need to be too sophisticated in terms of materials, but there are several points that need to be raised, which is also the author's evaluation process. Found in the first: the heat is better, some high-end products chipset is very hot, especially the 10736 program, the heat is large, so the relevant design must be well-heated, or can not guarantee regular downtime. Observing mainly depends on the design of the vents, whether there is a small fan design, etc., and must not give up these basic needs in pursuit of the shallowness and beauty of the appearance. Secondly, the remote control is sensitive. When I was evaluating the product, I touched several small factory products and found that the remote control is very insensitive. It must be aligned with the infrared receiver to be used normally. This is very inconvenient for the user. You may wish to try it before you buy. Again, there is a problem with the USB interface. Some HD players only provide one or two USB expansion devices. If you use wireless network cards, USB Flash Drives and mobile hard disks at the same time, there will be insufficient time. Finally, there is no problem with the HDMI cable in the attachment. Although the HDMI cable is not required by everyone, 1080P is absolutely necessary, and this HDMI cable also has a lot of money. (Next, we will launch a shopping guide for HD players, please follow up).
Mobile Accessories,Wired Headset,Usb Fan,Usb Drive
Shenzhen GEME electronics Co,.Ltd , https://www.gemesz.com