I have started writing for Anandtech since March 2010 on a variety of topics including HTPCs, smartphones, app processors and media streamers. I will use this post to link to my articles over there (latest on top)

1. Sep 30, 2011 : Roku 2 XS Review : Streaming Videos and Casual Gaming on the Big Screen

2. Sep 27, 2011 : G.hn Gains Momentum with Marvell Silicon [News Piece]

3. Sep 19, 2011 : QNAP TS-659 Pro II Review

4. Sep 6, 2011 : StarTech.com Portable SATA Duplicator & USB / eSATA Dock Review

5. Sep 2, 2011 : ASRock CoreHT 252B Review

6. Jul 28, 2011 : Compro IP 70 Network Camera Review

7. Jul 19, 2011 : Roku Brings Casual Gaming to TVs [News Piece]

8. Jul 18, 2011 : LG N2A2 NAS Review

9. Jun 30, 2011 : AMD A8-3850 : An HTPC Perspective

10. Jun 20, 2011 : Sigma Designs Skini Platform: Home Convergence using Hybrid STBs [News Piece]

11. Jun 12, 2011 : Discrete HTPC GPU Shootout

12. May 7, 2011 : Updates on the Netgear NTV 550 [News Piece]

13. Mar 11, 2011 : Nixeus Fusion XS Brings Marvell into the DMA Market [News Piece]

14. Mar 08, 2011 : TViX Slim S1 : Bidding Adieu to the Realtek RTD1283

15. Mar 04, 2011 : Nixeus Fusion HD Review

16. Feb 28, 2011 : Synology DS211+ SMB NAS Review

17. Feb 19, 2011 : Dell Zino HD 410 HTPC Review

18. Feb 14, 2011 : A.C.Ryan PlayOn!HD2 - First Realtek 1185 Media Streamer in the Wild!

19. Feb 02, 2011 : G.hn Silicon Emerges from Vaporware Territory

20. Jan 19, 2011 : AMD G-Series Brings APUs to the x86 Embedded Market [News Piece]

21. Jan 18, 2011 : A.C.Ryan Enters US Market with Innovative Media Players [News Piece]

22. Jan 12, 2011 : Westinghouse Brings LED & Netflix Enabled TVs to Budget Conscious Consumers [News Piece]

23. Jan 10, 2011 : CES 2011: Microsoft Keynote [News Piece, Contributing Author]

24. Jan 7, 2011 : Netgear @ CES 2011 [News Piece]

25. Nov 23, 2010 : The Boxee Box Review [Contributing Author]

26. Nov 08, 2010 : LaCie 5big Storage Server NAS Review

27. Oct 26, 2010 : Western Digital WDTV Live Hub Review

28. Oct 21, 2010 : NVIDIA Launches 3DTV Play, Bringing 3D Vision to the Big Screen [News Piece]

29. Oct 11, 2010 : NVIDIA's GeForce GT 430: The Next HTPC King? [Contributing Author]

30. Oct 03, 2010 : ASRock's High-End Vision 3D HTPC Reviewed [Linked by Engadget]

31. Sep 13, 2010 : Boxee Box: The Inside Story, Swapping Tegra 2 for Intel CE4100

32. Aug 25, 2010 : Netgear AV Series Set for Expansion [News Piece]

33. Aug 24, 2010 : Powerline Networking with the Western Digital Livewire

34. Aug 11, 2010 : Dropcam Echo: Home Security Meets the Cloud

35. Jul 19, 2010 : ASRock Core 100HT-BD : Bringing HTPCs to the Mainstream Market

36. Jun 25, 2010 : HD Video Decoding on GPUs with VLC 1.1.0

37. Jun 13, 2010 : Media Streamer Platforms Roundup

38. May 28, 2010 : The 2010 Google I/O Developer Conference Roundup

39. Apr 28, 2010 : Apple's Intrinsity Acquisition : Winners and Losers [Cited in EETimes]

40. Mar 31, 2010 : Smartphone Silicon : The 2010 CTIA Show Roundup

The news that Boxee was developing a hardware box through D-Link has been around for quite some time. This was made official with a press release in CES 2010. Ever since the talk started, the HTPC and media streamer community as well as the press has been abuzz with fulsome praise, as though heralding the arrival of the messiah who would deliver us all from the encumbrances associated with a HTPC setup.

The Boxee Box is indeed a game changer, but not of the sort that the average enthusiast wants. In my opinion, it deserves fulsome praise for taking the bold step to use a platform meant for the portable media player / tablet space in a set top box type media streamer. Never before has anything like this been attempted by any other player in this space. Have we ever heard of the iPod chips or cell phone application processors being used in HTPCs or the AppleTV or the Popcorn Hours? No! However, this is indeed the way of things to come, as semiconductor technology keeps on improving, and more and more powerful products start appearing at lower power and price points. The Tegra 2 platform is indeed a big step in this direction, but, is it powerful enough to lead the charge as Boxee wants us to believe?

Media streamer and HTPC enthusiasts have long been over promised and under delivered, most recently by the Realtek platform (Xtreamer is a particular case in point), and it only makes sense that they remain sceptical of the marketing claims of new products. However, the community never seems to learn, as blogs and forum posts talk of it being able to play any non-DRM media, and do everything that Boxee can do with its software platform on traditional HTPCs. People have even ventured to say that this would be a fully capable HTPC platform and there is nothing to indicate otherwise. We have already covered in previous posts as to what a fully capable HTPC platform is, and we will analyze whether the expectations are really fulfilled when the box arrives in the market. Till then, we have to speculate based on available information as to whether the expectations are really justified. Speculations leading to tempered expectations are eventually beneficial to the product.

Boxee has primarily been a software component run on HTPCs by people who need a nice user interface to the HTPC services. The fact that it is supported on multiple OSes indicates that the user base has completely different types of machines running underneath, not least on the hardware front. A Boxee user could have GPUs from Nvidia or ATI or Intel accelerating the playback of his local media. With a hardware box, I believe Boxee has inadvertently opened a Pandora's Box. In the rest of this post, I will put forward some observations in support of this fact. I will be looking at the box from two perspective, namely, the HTPC owner and the media streamer box enthusiast.

Boxee Box for the HTPC Market

By designing a box which makes it almost impossible for the end-user to change components, Boxee has ignored the most important advantage of a HTPC platform, namely, the ability to upgrade. For example, let us assume that the Boxee Box doesn't bitstream HD audio (There is nothing in the press release to indicate otherwise). A HTPC user interested in getting a cheap bitstreaming solution down the road would probably be looking at the ATI 5450 releasing in a couple of months. He puts down $50, gets one and replaces the aging graphics card he has inside his HTPC and is all set!

HTPCs are usually built upon the x86 platform. The software ecosystem is incredibly huge, giving the user utmost freedom in what he wants to do with the HTPC. Boxee Box will be running some flavour of Linux. However, the OS itself is not the issue, but the platform is. Tegra 2 is based on a dual core ARM Cortex-A9. People do have media that need to be decoded in software on the processor. An example in case is Real Video found in RMVB files. In the x86 platform, it is just a matter of downloading the appropriate codec (be it in Linux or Windows) and you are all set to play it. Not surprisingly, the Boxee Box press release doesn't advertise the playback of RMVB files. Unless the codec is compiled from source for the ARM Cortex-A9 platform, it is simply a no-go. How easy is it to compile for a new platform? What would the performance of the decoder be on the new platform? Would it be powerful enough to decode HD Real Media samples? Only time will tell. In essence, there will be a dearth of pre-built binaries for various tasks on the Tegra 2. Nvidia claims that Windows CE, Ubuntu and Android are all available on the Tegra 2, but it is probably just the base OS. Compiling popular x86 software for the new platform and whether the platform would be powerful enough to handle this remains to be seen.

Boxee Box for the Media Streamer Market

Purchasers of media streamers are usually owners of a HTPC in one form of the other, with the streamer replacing a part of the functionality of the HTPC. Many press reports describe the Boxee Box as a media streamer. These reports have led the community to believe that it can replace dedicated media streaming boxes such as the WDTV Live or the Asus O!Play. Can this really happen? The initial specs in the press release don't lend us much confidence. Boxee is also guilty of not indicating what type of encodes are really supported (the H.264 level, profile, maximum bitrate etc. / Support for Qpel & GMC in MPEG-4 and so on). It also falters similarly on the support for passthrough of DTS and Dolby Digital soundtracks over the HDMI output (bitstreaming of HD audio is conspicuous by its absence). Is multi-channel sound supported? If not, what is the maximum number of channels? 2.0, 5.1 or 7.1?

Conclusions

It would be foolhardy on the part of the community to expect all the features available in the HTPC version of Boxee to make its way into the media streamer version. Boxee would do good to clarify the exact capabilities of the Boxee Box so as to avoid unnecessarily raising the hopes of the HTPC and media streamer enthusiasts.

I have been working on this blog post for more than 3 months now! Every time I got down to writing something, an update from the GPU manufacturers ensued, and I had to rework my post.

In August 2009, the ATI 4650 was the undisputed leader in the HTPC market. Then, the consumer GeForce 210 and 220 series cards started coming out, and my colleague managed to grab one of those on a Newegg deal.

His experience with the GeForce 210 card and further research on various forums made me rework my post completely.

Head over to GeekTonic for my guest post, which covers this topic in detail.

The next thing to look forward to, hardware wise, on the HTPC front would be the commercial deployment of the Intel Clarkdale processors (with an on-die IGP).

On Googling for this, you will be instantly presented with a very informative set of links. However, the problem is that the forums posts and blog posts are dated. This is a fast changing field, and with every product release, the crown shifts from one company to the other. With this in mind, I intend to keep this series of posts updated as and when there are relevant market changes. I will provide the most interesting set of links from the Google results at the end of this post.

The next post will weigh the pros and cons associated with various graphics card options for a HTPC build.

Interesting Googled links for choosing a good HTPC card:

1. EngadgetHD Invited User Comments

2. AnandTech's Review of ATI 4350 and 4550

3. Max Builds a HTPC

4. AVS Forum Thread on ATI 3450

5. AVS Forum Thread on ATI HD 4600 and 4800 series

I will try to summarize the gist and conclusions from the forum threads in future posts so that you can save time by directly finding out the present state of affairs with respect to that topic.

This post covers the characteristics of the HDMI connection in a perfect HTPC.

Video support: The HDMI connection must be able to transfer video at 1080p (FullHD - 1920 x 1080). Even HDMI 1.0 is able to do this, so we are perfectly fine video wise.

Audio support: This is where problems start to creep in, depending on how your PC manages to get a HDMI output.

Nvidia graphics cards with HDMI output act as a dumb SPDIF passthrough (This is not to be confused with the AV receiver's passthrough). They require a wire connection from the motherboard's SPDIF pins onto the graphics card in order to be able to get the audio signals out through HDMI. Thus, all restrictions which exist for SPDIF audio also exist for this type of HDMI audio. Most SPDIF mobo connections are able to support only 1.5 Mbps bitrate (though some are supposed to be upto 6.144 Mbps), and thus, the HDMI audio out of such cards can also support a maximum of 6.144 Mbps only.

ATI graphics cards with HDMI output have an audio processing chip on board. They are able to grab sound through the PCI-E bus and need no mobo SPDIF connectors. This is pretty advantageous since installing the graphics card is a simple matter of plugging it into the PCI-E slot. (Depending on your mobo capabilities, you might need to connect to the AGP slot -- if you have a really old computer!). Whether the audio over HDMI from ATI graphics card is subject to the same issues and restrictions as the SPDIF outputs is not yet confirmed (One of the popular DirectShow audio filters, AC3Filter, is able to control ATI HDMI audio as a SPDIF output)

Present day Blu-Ray media have lossless HD audio codecs for their audio tracks. These include DTS-HD Master Audio and Dolby TrueHD. These audio tracks potentially need upto 36.864 Mbps of bandwidth for their 8 audio channels. SPDIF simply doesn't have enough bandwidth to support this. As far as I know, there are no ATI cards which support this much bandwidth also. If you want to get the sound out from the HDMI for these tracks, there is no option but to decode it inside the PC (VLC 1.0.0 claims it is able to decode DTS-HD and Dolby TrueHD in software) and convert to LPCM before sending it out through HDMI. Bandwidth requirements further restrict the sampling bitrate and frequency for this LPCM stream also, and it is not possible to maintain the same fidelity as the original sound track.

The funny thing is that all HDMI specs allocate 36.864 Mbps of bandwidth for audio (right from HDMI 1.0). Thus, it appears like the HDMI outputs from the graphics card manufacturers do not conform to any HDMI specification!!

As of now, audio over any PC HDMI port (be it the latest graphics cards or any IGP (integrated graphics on the mobo)) is subject to same restrictions as SPDIF. The only advantage over SPDIF is the fact that the number of cables coming out of the PC is minimized.

We need HDMI 1.3 at present to enable lossless HD audio codec bitstreaming. Standalone systems like Popcorn Hour and Xtreamer already claim HDMI 1.3 output support along with lossless HD audio codec bitstreaming. Mobo / Graphics Card manufacturers are fast running out of excuses. Manufacturers of mobos / graphics cards must clearly mention (with no small print anywhere) the version of HDMI supported, as well as the maximum available bandwidth for audio on their system. It is also essential that some APIs / support be provided to the DirectShow developers / open source developers so that the active multimedia community can make the best use of the platform to further the experience of the HTPC enthusiasts. The perfect HTPC will remain a Utopian dream until such a graphics card comes to the market.

The primary component of a HTPC set up is the PC itself. The primary objective is to get audio and video out of the PC onto your display and speakers. There are a multitude of ways to do this. The Wikipedia article on HTPCs gives you an array of options to get the video out, but no mention is made of the way to get the sound out (at least, the version on Wikipedia as of 20th Aug, 2009).

Video:
There is no point in going forward with legacy connections like Component, Composite, S-Video etc. which do not support Full HD (1920x1080 resolution). So, if you see any graphics card for your HTPC which support those connections, remember that your hard-earned cash is going to go towards supporting people with legacy equipment. If you are not one of them, you are better off getting a card without those connectors. In my opinion, VGA is as far back on the legacy scale that I would go while checking supported outputs, while shopping for a graphics card. Hence, we are left with three options, namely,

1. DVI: The DVI standard was brought about mainly to serve computer monitors with much higher desktop resolutions than what VGA supports. As such, it is not meant for TVs (which are the usual video display units for HTPCs). TVs rarely advertise the availability of DVI inputs. The main advantage of DVI connections is the fact that the resolutions output on them can far exceed 1920x1080 (can go up as high as 2560x1600). One of the variants of DVI can also carry audio but using DVI in a HTPC is fraught with issues. My suggestion would be to avoid using DVI connections completely for this purpose.
2. HDMI: HDMI is the de-facto standard for AV communication between most consumer devices (camcorders / Blu-Ray players etc. and TVs). Unfortunately, it is not royalty-free, but it got accepted into the market much earlier than the competing open standard (DisplayPort). Millions of devices have shipped with HDMI in them, and it is not possible to turn back the clock. As of now, there is no better alternative to using HDMI for our AV needs in a HTPC. HDMI 1.2 could only support upto 1920x1200, but HDMI 1.4 (the specs of which were released in May 2009), can support upto 4096x2160. It is good to see that HDMI is keeping up with the times. However, as of now, we do not need to worry much since there are no commercially available and affordable TVs which go above the 1920x1080 resolution.
3. DisplayPort: The most interesting option is the DisplayPort. It is royalty free, which means lower cost for the consumer, but it got into the game later compared to HDMI. Hence, its adoption rate is low. It also supports audio. At present some high end Dell monitors support DisplayPort, but no TVs as of August 2009 support it. Hence, for HTPC purposes, it is best to stay away from DisplayPort.
   

Weighing the pros and cons, we can safely reach the conclusion that HDMI is the way to go in order to get video out of your HTPC.

Audio:
Most motherboards have inbuilt audio nowadays. Depending on the output availability, the following methods can get the audio out of your PC:

1. Analog Out (2 - 8 channels): These are the PC outputs which can be directly connected to computer speakers. The digital sound (in terms of 0s and 1s) inside your PC undergoes digital-to-analog conversion with chips inside the motherboard / sound card. The quality of the DAC chips decide the cost of the card / mobo. HTPC enthusiasts usually don't trust these DACs, and that is the sole reason why it is preferred to get the audio out from the PC as a stream of bits (digital audio). It must be kept in mind that costly soundcards have high quality DACs inside them, and the analog audio out for these are usually fine by HTPC standards. However, there is a very valid reason to avoid these add-on cards (dependent on other components of your HTPC)
2. SPDIF Out: This is a way to get the digital audio out of your PC. This means that the conversion to actual sound takes place in some other component of your HTPC outside the PC. Almost all AV receivers have a SPDIF input and the PC output can be connected to this. The speaker wires then run from the AV receiver and then onto the actual speakers. The DACs to convert digital audio to analog are inside the AV receiver. There are two types of SPDIF connectors (as mentioned in the Wikipedia article), namely, Coaxial and Optical. Since AV receivers can process multi-channel sound, SPDIF can be used to transmit 5.1 channel digital audio also. SPDIF is preferable to analog out, since the HTPC enthusiast has more control over the quality of the DACs which provide him with the sound.
3. HDMI: Well, we encounter HDMI again! HDMI provides for digital audio transfer similar to SPDIF, with the advantage that it is part of the same cable that carries the video! This minimises cable clutter at the output of the PC. However, there is a downside with respect to the fact that the HDMI receiver be able to understand the audio signals coming through. The HDMI cable from the PC's output can be directly connected to your display's HDMI input. If you are connecting the HDMI cable from the PC directly to the display, you will have to make sure that the sound output through the HDMI is stereo LPCM (or, in layman's terms, completely decoded digital sound with only 2 channels). Multi channel output connected to TVs do not really make your HTPC experience any better. A home theater evokes images of surround sounds where you get immersed in 5.1 or 7.1 channel surround sound with speakers all around you. To get this, the HDMI cable has to be routed through a AV receiver. Many AV receivers boast of HDMI inputs and outputs. Do not get misled by this marketing hogwash. Read the fine print of the AV receiver's specifications, and make sure that it is capable of decoding / processing sound on the HDMI input. In most receivers, the feature to decode sound signals on the HDMI input is termed as the 'repeater function' in contrast to the 'pass-through function' where the signals appearing on the HDMI input are transferred unmolested to the HDMI output. If the AV receiver is a repeater, the HDMI output from it is video only. This video is then displayed on your TV and there is no need for the display to process sound. The sound is routed by the AV receiver from the HDMI input and onto the speakers after the necessary processing (decoding / digital to analog conversion).
   

The perfect HTPC set up would utilize HDMI for transferring both audio and video out of the PC.