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Multimedia - 'WD TV Live' Streaming Media Player

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 WD - logo Regarding acceptable bandwidth SOHO devices for multimedia application, developed a multitude of devices that are able to play and record media, but is perhaps the most interesting device that can distribute multimedia content in the home (SOHO) network, such as for example 'WD TV® Live™ Streaming Media Player' by firm 'Western Digital' shown in the following figure.

 WD TV Live Streaming Media Player
Figure* 2.1 WD TV Live Streaming Media Player / Interior. ( + / - )

Small box measuring 125.5 mm × 100 mm × 40 mm (LxWxH), weight of 300 g, which is decorated with the following characteristics:

Device / Function Peculiarity
Microprocessor & chipset Sigma Designs SMP8670AD-CBE3 media processor
System/DSP Clock Rates 700/350 MHZ
MPEG-2, MPEG-4, WMV, AVS, DVM, RMVB,
SMPTE video decoding
12 bit video processing, 12 bit deep color
Memory DDR2 32 bit / 512 MB
Peripheral I / O
possibilities
UART, SDIO, CH I2S, SPDIF, I2C, SPI, Ethernet,
USB, SATA, GPIO, DVB-CI, CVBS, S-Video,
Analog RGB, Digital RGB, HDMI
Operating system Stored on a 2GB NAND Flash chip, developed by WD
Built-in hard drive No
Supported video formats AVI (Xvid, AVC, MPEG1/2/4), MPG/MPEG, VOB,
MKV (h.264, x.264, AVC, MPEG1/2/4, VC-1),
TS/TP/M2T (MPEG1/2/4, AVC, VC-1),
MP4/MOV (MPEG4, h.264), M2TS, WMV9
Maximum of video resolution 1920 x 1080 pixels (Full-HD, 1080p)
Supported image formats JPEG, GIF, TIFF, BMP, PNG
Supported subtitle formats SRT, ASS, SSA, SUB, SMI
Supported audio formats MP3, WAV/PCM/LPCM, WMA/WMA Pro,
AAC, FLAC, MKA, AIF/AIFF, OGG,
Dolby Digital Plus, DTS
Supported file systems NTFS, FAT/FAT32, HFS+
Sequence presentation of images Yes
Ethernet network connectivity
(100Base-T)
Yes
Wireless network connectivity
(802.11b/g/n)
Yes
HDMI output (version 1.3) Yes
Optical digital audio output
(S/PDIF)
Yes
USB 2.0 port Yes (2 ports)

There are still features of the image in relation to the table, analog AV outputs and the RESET button in the device deletes all settings entered by the user and sets the default settings. The remote control communicates with the device through hand-IR transmitter, although it is not the sole means of communication with him. Supports USB keyboard and it can be accessed through the web-like of software through the network infrastructure. File systems supported are related to disk resources on the computers in the network designated as available. As each device in the network must have a defined IP settings as shown below.

 IP settings of 'WD TV Live'
Figure 2.2 IP settings of 'WD TV Live' device.

IP settings are automatically downloaded from the SOHO devices via DHCP mechanism, so depending on the ISP data can be different in relation to the displayed and can be adjusted at will, so that for example the IP address is taken as static, so as not be changed by including various devices in the network. Wireless network communication support ' N ' standard with WPA2-PSK+AES encryption of communication, which is enough for the speed of communication concerning multimedia content, although it is better to use Ethernet as the communication antennas embedded in a small enclosure and you should not expect high-quality wireless communication if the device not close to SOHO devices. In addition to basic IP parameters, it is necessary to set the correct code page, which in the case of localization of the Croats was codepage {Setup}-{System}-{Additional Encoding Support}-|Central Europe (Windows-1250)|.

Microprocessor is shown in Figure 2.1b is 'media' processor, clocking 700 MHz, is responsible for processing a variety of multimedia formats, operating system and software support are written in his memory NAND FLASH type size of 2 GB (soldered to the underside of the printed circuit board shown in Figure 2.1b), which can be updated via Internet service of WD. The processor is cooled by a passive heatsink.

To test 'WD TV Live Streaming Media Player' device has quite a lot of video content on the 'YouTube' service with HDTV 1080p resolution, one of the test video .mp4 format among other features and display the following picture.

 Test video
Figure 2.3 One of picture of the test video.

Basic characteristics of the test video are:

          Video
               Format                                   : AVC
               Format/Info                              : Advanced Video Codec
               Codec ID                                 : avc1
               Codec ID/Info                            : Advanced Video Coding
               Bit rate                                 : 632 Kbps
               Maximum bit rate                         : 14.3 Mbps
               Width                                    : 1 920 pixels
               Height                                   : 1 080 pixels
               Display aspect ratio                     : 16:9
               Frame rate mode                          : Constant
               Frame rate                               : 25.000 fps
               Color space                              : YUV
               Chroma subsampling                       : 4:2:0
               Bit depth                                : 8 bits
               Scan type                                : Progressive

          Audio
               Format                                   : AAC
               Format/Info                              : Advanced Audio Codec
               Format profile                           : LC
               Codec ID                                 : 40
               Bit rate mode                            : Variable
               Bit rate                                 : 3 096 bps
               Maximum bit rate                         : 3 240 bps
               Channel(s)                               : 2 channels
               Channel positions                        : Front: L R
               Sampling rate                            : 44.1 KHz
               Compression mode                         : Lossy

Test video is not particularly large (9.16 MB), is one of the simpler, but it is sufficient, and there are considerably more complex content. Action L1 at Figure 2.3 to download it.




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