Set tradition and fashion in one! Yin yuehui T 13FHD evaluation

IT 168 Digital Evaluation Yinyuehui started the comprehensive upgrade of MP4 product line at the beginning of this year. 1080P models with stronger video decoding ability become the main force, such as T 1 1TE and T 17FHD, which are all very representative products. Yinyuehui brand has always emphasized the personalization of products, so they tried a brand-new chip scheme on the 1080P model? Amlogic, and T 13FHD also adopts the dual operation mode of key and touch, which combines traditional and fashionable operation modes. Of course, gorgeous UI design is still a major attraction of products.

The workmanship of Yinyuehui T 13FHD basically inherits the brand's consistent high-level design, and its shape is simple and generous, which is particularly prominent among many similar products. UI design has always been the most advantageous part of Yinyuehui products, and this T 13FHD is no exception. Translucent control bar, strong stereoscopic shadow effect and iconic Wigdet plug-in design all add a lot of color to the product. In addition, T 13FHD also integrates the operation mode of combining buttons with touch screen to improve the operation experience and speed.

Overview of product functions: (official parameters)

Equipped with 5 inch 800? 480 resolution screen;

There are touch screen and button dual operation modes;

Support 1080P video decoding;

Support coding such as AVC and video formats such as RMVB, AVI, MKV and MP4;

Support MP3, WMA, WAV, APE, FLAC and other audio formats;

Built-in HDMI interface supports 1080P output;

Support picture browsing function;

Support text reading function;

Built-in MIC, real-time voice recording;

Automatic switching of desktop background;

Wigdet plug-in design with desktop:

Built-in speaker and TF card slot;

USB2.0 high-speed transmission;

Support firmware upgrade.

Is the T 13FHD received by the author still an engineering prototype? Only a single machine has no packaging and accessories. You can refer to the previous T 17FHD. Since it is the same series, it should be similar. T 13FHD is simple in shape, the panel frame is made of zinc-magnesium alloy, and the matte design is rich in texture. Add a black box to the edge of the screen to make the screen part look bigger. The workmanship of the products is very meticulous, and the materials used are also rich in texture, so even if everyone is designing with narrow borders, Yinyuehui's products also have a unique sense of elegance.

The color matching on the back of the fuselage is different from that on the panel. Pure white shell plastic material, the surface is warm and smooth, the lines are soft and smooth, and the font color matching is also very comfortable. You can see the built-in speaker in the upper left corner of the fuselage. The maximum volume of T 13FHD is 32, and the external sound volume is moderate when it is fully open, which is suitable for use in a quiet indoor environment.

T 13FHD adopts a 5-inch screen, and the body size is about 129? 83? 1 1mm (there may be a slight error in ruler measurement), which is quite textured in your hand but not too heavy, and it is also convenient to carry out. By the way, people are generally worried that if the border is too narrow, they will always encounter misoperation of the touch screen, right? T 13FHD has the same automatic keyboard lock as iPhone, so as long as you don't manually open the unlock bar on the screen, you won't misoperate.

Interface design and peripheral accessories

The author has shouted several times. T 13FHD is a dual operation mode of touch screen and buttons, but it does not mean that the product has independent full button operation or full touch screen operation, but both. In addition to the on-off key, there are independent volume adjustment and direction keys on the fuselage, which can be used with the touch screen during operation to maximize the use speed and reduce the probability of misoperation. The direction key and power switch are on the left side of the screen, and the headphone jack and video output interface are also on the same side. T 13FHD adopts standard 3.5mm earplug jack, which can support color difference component output mode.

The volume adjustment button is in the lower left corner of the screen. It can be seen from the photo that there is an infrared receiver in the lower right corner, indicating that the product can be operated by infrared remote control. The official product should be equipped with a special remote control, and there is only a single machine in Bian Xiao, so it is impossible to do the corresponding test this time.

The interface on the right side of the screen has a dust cover made of plastic, so don't worry about deformation. From left to right in the photo are TF card slot, power interface, HDMI interface and USB transmission interface. It can be seen that T 13FHD can support two different video output modes, color difference component and HDMI, support memory card expansion, and can be used by external independent power supply.

You can hardly see the dust pad after it is covered.

In order to prevent T 13FHD from streaking, Bian Xiao matched it with MOFI fan beaded flannel bag with the size of XXXXL. The product is a little loose after being put in, and the fitness is about 97%.

Size contrast

Screen viewing angle

Yinyuehui T 13FHD adopts a 5-inch screen with a resolution of 800? 480, its backlight has five levels of adjustable brightness, which is good, but the viewing angle performance is generally not suitable for many people to watch at the same time.

Menu design, music playing

The interface design of T 13FHD is very distinctive. It inherits the Wigdet plug-in design of previous products, and the plug-in content is richer and easier to set. You can see two control bars in the interface. Vertical music boxes, pictures, calendars and clocks are not shortcuts of functions, but switches of Wigdet plug-ins. Click on them to open the plug-in content, in which music, pictures and calendars cannot be displayed at the same time, and the clock can be used with the other three plug-ins at the same time.

The plug-in on T 13FHD not only has beautification function, but also has certain practicability. For example, the music box can directly play audio files, the picture can play photos like a desktop photo frame, and the calendar and clock are also displayed in real time, which is very beautiful and practical.

Picture plug-in

The horizontal control bar is the main function of the product, which supports sliding operation, but it does not need to turn pages in actual use. Additional functions on fold include recording, calculator, calendar and stopwatch functions in the second screen, from which players can directly choose. In addition, the two control bars of T 13FHD can be hidden. Just click the close and direction icon of the control bar connection, and the background desktop can be automatically switched. People who don't know thought it was a digital photo frame.

Audio playback:

Let's start with the most familiar music. From its interface, we can know that the menu of T 13FHD also starts with path selection directly, but there are no options such as media library. At present, ID3 information classification is not supported, but ID3 information of files can be displayed in the playback interface. You can see the clock and power display in the status bar at the top of the interface. On both sides of the function title, there are two different return virtual keys: return to main interface and return to superior interface. During operation, the product supports sliding control. In order to reduce misoperation, Bian Xiao recommended that you directly click the direction keys at the upper and lower ends of the wheel to switch a screen directly.

In the play interface, ID3 information is displayed, and you can directly see the file name (limited in length), artist and album name. The album cover next to it cannot be used in the current firmware, only the following digital information can be seen. Everyone is familiar with the control keys in the playback state, such as file switching, fast forward and fast backward, play/pause and stop. In fact, you can also click the progress bar directly in fast forward and fast backward, and the volume adjustment is to click the speaker icon next to it to bring up the control bar (you can also press the button directly).

At present, there are only two options in the music setting menu: repetition mode and sound effect. Repetition mode includes whole song and single song, and preset sound effects include ordinary, classic, pop and jazz. After testing, T 13FHD can support a variety of audio formats, such as MP3, WMA, OGG, APE, FLAC, AAC, WAV, etc., but OGG files are limited to Q0 to Q 10, and Q- 1 files cannot be played.

1. lossy compressed music format test:

Mpeg-1layer3 (8khz ~ 44.1khz, 8Kbps~320Kbps CBR): playable.

Mpeg-1layer3 (44.1khz ~ 48khz, 73Kbps~270Kbps VBR): playable.

Windows Media Audio 9 (8 kHz ~ 44.1kHz, 5Kbps~320Kbps CBR): Playable.

Windows media audio 9 (44.1khz to 48 kHz, 65 Kbps to 3 10 Kbps VBR): playable.

OGG Vorbis(44. 1KHz~48KHz, 64Kbps~500Kbps Q0~Q 10): Playable.

Apple iTunes compresses AAC encoded .m4A file (44. 1KHz, average 129Kbps): playable.

2. lossless compression music format test:

FLAC format file converted by JetAudio (44. 1KHz, average 100 1Kbps): Playable.

Windows Media Audio 9 is missing (44. 1 kHz, maximum 4677Kbps, average 827Kbps): not supported.

Pulse code modulation native WAV format file (44. 1KHz, average1411.2kbps): playable.

Monkeys? S Audio compressed single in APE format (44. 1KHz, with an average of 874Kbps): playable.

Monkeys? Audio compressed album in APE format (44. 1KHz, with an average of 926Kbps): Playable.

Monkeys? CUE partition list of audio compressed APE format album: not supported.

3. Left and right channel test:

After testing, the output of left and right channels of T 13FHD is normal, and there is no obvious crosstalk problem.

4. Noise floor test:

Turn the volume of the player to the maximum. Play? IMP3 noise floor test file? T 13FHD has a slight noise floor.

Video playback, AVC file test

Finally, I have to talk about the most important video playback function. T 13FHD supports the display of SUB, ASS, SSA and other subtitles, has the function of breakpoint replay, and can support various coding formats. Although its interface is simple, it has all the necessary functions in video playback. The T icon in the control bar can switch subtitles, and the playback progress bar can directly click and drag the playback position, which is very convenient to use.

In addition, you can directly adjust the screen brightness after calling up the menu, support sound adjustment similar to music playing, and also directly switch multi-channel files. At present, display contrast supports five modes: original scale, full screen, scale preservation, 4:3 and 16:9 to achieve the best display effect of the film.

Support full-screen playback, and the control bar is automatically hidden.

Please refer to the test results table below for the specific encoding format compatibility test. The current firmware version of T 13FHD is V2.8.

In this part of the test, the performance of T 13FHD is still excellent, so we will pick out the parts that the product does not support. It can be seen from the results that T 13FHD does not support high-resolution MP4 files encoded by AVC, and frame loss will occur. AVC-encoded AVI files will have serious frame loss even if the video bit rate is not 1080P, but above 8Mbps. The product does not support Sorenson 3 encoding, and MOV files encoded by H.263 do not support MP3 audio encoding.

Compatibility test of video coding formats

XviD DivX test

The test T 13FHD of the XviD DivX coding part also performed well, but from the results, the support of the AVI file encoded by XviD for 5. 1 channel is not perfect, and there will be slight audio-visual synchronization. In addition, files with encoding rates higher than 6Mbps will not be directly supported. Special mention should be made here to the test film B59, which is not only a multi-subtitle switch, but also a lot of dual-line displays in two languages (for example, Chinese and Japanese are in the same subtitle column). At present, mainstream MP4 products don't have much perfect support. The best situation is to display only Chinese, or jump to a line of Chinese quickly after displaying Japanese, while T 13FHD can directly display two lines, one line of Chinese and one line of Japanese, which is completely unaffected by bilingual subtitles.

RMVB test

T 13FHD plays RMVB video perfectly, and the video playback is extremely smooth. However, at present, the firmware does not support RMVB video encoded by AAC audio enough. 1280? The audio part of the file within 720 resolution will be dropped to varying degrees, and the sound part sounds strange? 1440? A file with a resolution of 8 16 directly indicates that it is not supported and seems to need improvement.

FLV test

Generally, there will be WMV test before FLV test, but T 13FHD doesn't support VC- 1 coding at all, so it is skipped directly. At present, FLV video only supports H.263 coding, and cannot play FLV video encoded by VP6 and AVC.

Video resources practical test film: Panasonic HD demo- Brazilian wildlife

File size: 825MB

Game time: 4 minutes and 40 seconds

Total coding rate: 24.7Mbps.

Video coding: MPEG version 2 Main@High(MPG encapsulation)

Image resolution: 1280? 1080 pixel

Frame rate: 29.97Fps

Audio coding: MPEG layer 2

Audio coding: 48.0KHz, 384Kbps (stereo).

The first test is an MPG packet file with a coding rate as high as 24.7Mbps. The performance of T 13FHD is excellent, the picture is extremely beautiful, the color transition and line edge are also very natural, and the effect is excellent. Of course, this video is not 1080P, but it is enough for portable products like T 13FHD.

Test film: dark blue

File size: 300MB

Game time: 1 min 53 seconds

Total coding rate: 22. 1Mbps.

Video coding: AVC high @L4.0(TS package)

Image resolution: 1440? 1080 pixel

Frame rate: 25Fps

Audio coding: DTS/AC-3

Audio coding: (DTS)48.0KHz, 1536Kbps(6 channels); (AC-3)48.0KHz, 384kbps (6 channels)

AVC encoded TS video is not 1080P, but the bit rate is also quite high, reaching 22. 1Mbps. The waves in the picture are rolling and magnificent. The performance of T 13FHD this time is not as smooth as the last time, and the picture has obvious frame drop phenomenon, but it is not very serious on the whole, which does not affect the normal viewing.

Test film: ghost in shell

File size: 545MB

Game time: 26 minutes, 2 1 second.

Total coding rate: 2907Kbps.

Video coding: AVC high @L4. 1(MP4 packet)

Image resolution: 1920? 1080 pixel

Frame rate: 25.79 frames per second

Audio coding: AAC

Audio coding: 48.0KHz, 192Kbps (stereo).

Subtitles: Sub-external subtitles

Finally, it rose to the test of 1080P video. In the previous compatibility test of T 13FHD, the performance of MP4 package file is slightly worse than other formats. This test film also has obvious frame drop phenomenon, which is more obvious when the camera moves quickly. Fortunately, the sound and picture are synchronized, and the frame drop is not serious enough to affect the movie plot. The biggest feature of this product is that it can normally play subtitle files that need IDX index, which only a few mainstream MP4 products can do.

Test film: Black Reef

File size: 653MB

Game time: 22 minutes and 28 seconds

Total coding rate: 389 1Kbps.

Video coding: AVC high @L4. 1(MKV package)

Image resolution: 1920? 1080 pixel

Frame rate: 23.976Fps

Audio coding: AAC

Audio coding: 48.0KHz, 197Kbps (stereo).

Subtitles: ASS external subtitles

The video coding rate of this MKV packet is higher than the previous MP4 format, but the playback effect is obviously much better. Only a few shots have a slight frame drop phenomenon, and most of the pictures are quite smooth, with no obvious frame jam or other problems. The test results are satisfactory.

Test film: JVC HD demonstration-the beauty of Japan

File size: 642MB

Game time: 4 minutes and 46 seconds

Total coding rate:18.8mbps.

Video coding: MPEG version 2 Main@High(AVI encapsulation)

Image resolution: 1920? 1088 pixels

Frame rate: 25Fps

Audio coding: MPEG layer 2

Audio coding: 48.0KHz, 256Kbps (stereo).

This test film is an AVI file encoded by MPEG2-2, with a high encoding rate of 18.8Mbps, smooth picture and rich colors. Only when the camera moves very fast, or in some complicated pictures, will there be a slight frame drop. Bian Xiao can't tell if he doesn't stare carefully. The play is perfect.

Picture:

The list of image browsing functions is previewed and displayed in the form of thumbnails and file names. At present, content in JPG, BMP and PNG formats can be supported.

T 13FHD supports double-line operation, and can continue to play music while playing pictures. If you want to turn off the music in the previous product, you must return to the audio playback function. On T 13FHD, we can mute it by clicking the music icon in the control bar. In addition, the product also supports the functions of picture rotation, enlargement and automatic playback, and can adjust the screen brightness in the menu to set the favorite photo as the desktop background.

Picture full-screen playback effect

Image loading speed test:

JPG format: 1200? The resolution of 9 10 takes about 1 s; 196 1? The resolution of 1293 is about 1 sec; 2945? The resolution of 1778 takes about 1 sec.

BMP format: 1200? The resolution of 972 takes about 2 seconds; 1979? The resolution of 1366 takes about 4 seconds; 2560? The resolution of 1600 takes about 7 seconds.

PNG format: 1044? The resolution of 797 takes about 2 seconds; 1560? The resolution of 1 157 takes about 4 seconds; 205 1? The resolution of 1457 takes about 7 seconds.

Flash:

FLASH playback is a special function of T 13FHD, which can directly play the file content in SWF format. In addition, the product itself is a full-screen touch mode, which can not only play FLASH animations, but also download some FLASH games, which is more playable than random games. No wonder T 13FHD didn't design an independent game function.

FLASH animation playback

Text reading:

T 13FHD supports the reading function of TXT text, and the reading effect is excellent with the support of vector fonts. Is the imitation paper background designed like an ancient book? It looks quite clear, the font size and color can be switched, and the background will automatically turn black when the font is switched to white.

In addition, T 13FHD also supports text version switching, independent bookmarks and automatic browsing. When you switch to hard browsing, the control bar will also switch to portrait mode. The problem that the early products only switched the text direction has been solved for a long time ~ In the test, T 13FHD can now support TXT files encoded by ANSI, Unicode(big endian) and UTF-8.

Vertical reading effect

Voice recording:

The above functions of sliding menu can be found in the control bar of the main menu. Comrades like Bian Xiao who are too lazy to turn pages can find calendars, stopwatches, calculators and recording functions by opening the additional function bar.

T 13FHD is a hidden microphone. There is no straight hole in the fuselage, so the recorded volume is relatively low, but the definition is good. There is no choice of quality and format for voice files. By default, they are saved in WAV format. When saving the file, the player can also directly input the file name through the virtual keyboard of the product.

Utility, showing adjustments

In the calendar function, you can query the date of the day, including week, Gregorian calendar and lunar calendar, but you can't directly modify the system time from here, you can only query the function.

T 13FHD's stopwatch can not only record time, but also compare time, because it supports the function of recording results, not only can record time repeatedly, but also can directly save the required results in the left column? Notepad? Let's go

The calculator of T 13FHD can perform simple operations of addition, subtraction, multiplication and division. AA, can I take it under the table when I eat? Hmm? Just gave me twenty cents more!

The content of system settings is still rich, and the functions are divided into four categories: display, play, time and system. The display category can be switched to video output mode, which has three modes: HDMI, color difference component and AV composite, and the highest output resolution is 1080P. In addition, the system background and backlight brightness can also be modified in this tab.

System settings, transmission speed

The content of the play menu is quite easy to understand. You can modify the sort order of files, support directory selection, and support breakpoint playback.

The system time of T 13FHD cannot be modified directly in the calendar, but only by entering the time tag set by the system. The time tag has two contents: time and date.

There are many things in the system label. The menu is in Chinese, English and Chinese. Support automatic screen closing and automatic shutdown, as well as sleep shutdown settings. There are three small options in the system configuration, firmware upgrade, factory settings restoration and system information inquiry.

T 13FHD adopts high-speed USB2.0 transmission interface. After software testing, the fastest random writing speed is 3565KB/S and the fastest random reading speed is 4891KB/s; In practical application, it takes 57 seconds (about 3.26MB/s on average) to copy an independent 186MB file, and 1 min 4 1 s (about 3.64MB/s on average) to copy three files with a total of 368MB.

The conclusion of the article:

Although the Yinyuehui T 13FHD sent for testing is only an engineering prototype, its functions are quite perfect, and there are no automatic exits, playing errors, crashes, etc. in the process of using Bian Xiao, which shows that its system is quite stable. Judging from the playback results, T 13FHD has made some progress in decoding ability, especially for MKV files encoded by AVC. Embedded/external subtitles can basically be displayed normally, and IDX subtitle index and bilingual subtitle display are supported. These details can better reflect the design skills of manufacturers in the era of quite homogeneous functions. It is reported that T 13FHD costs 599 yuan (8GB capacity) and will be sold nationwide in the near future.