For the second time in almost as many weeks, a Japanese company has been showing off a handheld device with built-in television tuner. This one is a phone with TV, not a PDA like that last one, but it still looks very interesting and promises to open more doors like this for PDAs going forward.
ZDNet Japan has the full story. Here’s the translation thanks to Babelfish. Be sure to visit the link for more pictures.
Sanyo, developing the terrestrial digital TV correspondence portable telephone
The Sanyo Electric used 2.2 inch organic EL display, the portable telephone of terrestrial digital television broadcasting correspondence was made on an experimental basis. Besides the fact that you use the tip/chip of new development and can do television viewing of 90 parts, video recording of 30 parts is possible inside. The substance corresponds to CDMA2000 1x.
The Sanyo Electric August 8th, developed the experimental model of the portable telephone which loads terrestrial digital television broadcasting reception function. Diver city reception system and direct conversion system were adopted new to develop “1 segmented reception module”, television viewing of approximately 90 parts is possible. In addition, by the fact that flash memory of the 128M byte is built in, video recording playback of television image of approximately 30 parts can be done.
Hiroshi Satoru Maeda of the same company managing director “keeps developing, 2005 supposing the start of Mobile broadcast,”, you say. Concerning production cost “we would like to hold down to 5000 – 6000 Yen rises”, that it did.
As for being able to receive, 1 segmented broadcast of the terrestrial digital television. As for animated picture the simple profile of MEPG-4, as for sound it corresponded to MEPG-2 AAC. Broadcast size is QVGA (the 240 ~320), but as for resolution of display 176 ~220 pixel. Length/it crosses the screen and changes, can also use the picture widely.
As for the substance with sliding type of 2.2 inch organic EL display loading which corresponds to CDMA2000 1x, as for weight 150 grams. It has 2 11 ten thousand pixel CCD cameras.
As for the terminal which becomes the base the organic EL on-board sliding type terminal which was advancing development to for au (2002 October article reference)
The rear expands a little, the antenna for terrestrial digital broadcast is added
New tip/chip of diver city and direct conversion
As for technical feature of the latest experimental model, there is adoption of diver city reception and direct conversion system.
As for diver city reception, having the plural antennas, the technology which synthesizes the plural signals which it receives. As for Department Manager Morio Matsudaira of the same company engineering development headquarters in the Mobile equipment circumstance of radio wave changes “different from the deferment television. When reception sensitivity is bad by the fact that it makes diver city even, it reaches the point where it can indicate “, that meaning is explained.
2 these antennas have been attached to the experimental model, but 1 the for portable telephone, already 1 for digital TV. When doing diver city reception, the antenna of earphone microphone type is connected.
As for direct conversion system, Radio Frequency of the UHF band (RF) from the signal, one of the systems which to the baseband signal frequency are converted. IF (IF) through the signal, frequency it converts directly. Number of articles decreases and miniaturization of the tip/chip becomes possible.
In the experimental model, as for the digital TV part and the portable telephone part being carved, it was loaded in connection with development process. When even under present conditions there is telephone arrival during TV perusing, the interruption is possible, but it will advance also the common use conversion at part level in the future.
“By the improvement of carrying, that the part which is used in TV can be converted commonly” Maeda. Common use of the application processor and the flash memory etc. which concretely, presently it is on-board separately is assured.
Furthermore, the experimental model installed the TV televising vessel in the terminal of CDMA2000 1x, but it does not depend on the communication method of the portable telephone completely. Maeda expects “in the future we want the all portable telephone becoming the TV attachment”, that.
Block diagram of experimental model and summary of module. It developed the OFDM recovery section with synthesis jointly
Topic it is quick the beam electric battery
It follows to NEC, technically aim of actualization passed e.g., also Sanyo releases the experimental model.
As for topic there is three largely. As for one for Mobile standard of broadcast has not finished to become firm. In the experimental model it corresponded to MPEG-4, but (2002 February article reference) there is also a voice which recommendsH.264 from broadcast industry centering on the payment related to patent, (2002 October article reference). If it does from terminal manufacturer side, “as for H.264 in comparison with MPEG-4 circuit scale to be large in electric power consumption and the aspect of heat is disadvantageous”.
Second is method of appearing the communication carrier which is the supply cause of the terminal. If it does from the carrier, the fact that you can look at TV with carrying can be tied to also communication, if the merit is large. But the browser which is used in bidirectional data communication of terrestrial digital broadcast there is no HTML based browser and compatibility which presently the portable telephone is on-board, does not solve in fusion of broadcast and communication and as for the the good point is many.
Third is problem of electric power consumption. In the experimental model, (as for usual carrying 700mAh), the perusal time of TV was extended by the fact that the battery of the bulk, 960mAh is loaded. But even then it is not enough yet.
“Topic 1st as for electric power consumption. It gets near to proper value, but being to be carrying, until it returns to the telephone call and the home of 1 day 10 minute or more, it receives and time and, furthermore would like to make TV viewing of 60 minutes or more possible. When further electric power consumption decrease “is necessary, Maeda speaks.
At present, it is low substantially, there is no part which can aim for electric power consumption conversion, cannot expect either the substantial increase of battery life. Electric power consumption conversion only is assured little by little low in the section.
As for Maeda “electric power consumption it is profitable (in comparison with the NEC experimental model that), you think” that comment. Also technical competition of terminal manufacturer side started 2005 for Mobile which is expected destined for the start of terrestrial digital broadcast.