دستگاه گیرنده دیجیتال فراسو مدل FDR-217 AC

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دستگاه گیرنده دیجیتال فراسو مدل FDR-217 AC
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دستگاه گیرنده دیجیتال فراسو مدل FDR-217 AC

 PAL, NTSC خروجی تصویر
امکان جستجوی خودکار یا دستی کانال ها
قابلیت پیش نمایش کانال ها
CVBS, YUV, Coaxial, R&L, S-VEDIO, HDMI دارای خروجی
پشتیبانی از نسبت های صفحه نمایش 4:3, 16:9
نمایش جدول پخش برنامه ها تا 7 روز

DVB-T is an abbreviation for Digital Video Broadcasting — Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997[1] and first broadcast in the UK in 1998.[2] This system transmits compressed digital audio, digital video and other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation

Basics of DVB-T

Rather than carrying the data on a single radio frequency (RF) carrier, OFDM works by splitting the digital data stream into a large number of slower digital streams, each of which digitally modulate a set of closely spaced adjacent carrier frequencies. In the case of DVB-T, there are two choices for the number of carriers known as 2K-mode or 8K-mode. These are actually 1,705 or 6,817 carriers that are approximately 4 kHz or 1 kHz apart.

DVB-T offers three different modulation schemes (QPSK, 16QAM, 64QAM).

DVB-T has been adopted or proposed for digital television broadcasting by many countries (see map), using mainly VHF 7 MHz and UHF 8 MHz channels whereas Taiwan, Colombia, Panama, Trinidad and Tobago and the Philippines use 6 MHz channels. Examples include the UK's Freeview.

The DVB-T Standard is published as EN 300 744, Framing structure, channel coding and modulation for digital terrestrial television. This is available from the ETSI website, as is ETSI TS 101 154, Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream, which gives details of the DVB use of source coding methods for MPEG-2 and, more recently, H.264/MPEG-4 AVC as well as audio encoding systems. Many countries that have adopted DVB-T have published standards for their implementation. These include the D-book in the UK, the Italian DGTVi,[3] the ETSI E-Book and Scandivia NorDig.

DVB-T has been further developed into newer standards such as DVB-H (Handheld), now in operation, and DVB-T2, which was recently finalised.

DVB-T as a digital transmission delivers data in a series of discrete blocks at the symbol rate. DVB-T is a COFDM transmission technique which includes the use of a Guard Interval. It allows the receiver to cope with strong multipath situations. Within a geographical area, DVB-T also allows single-frequency network (SFN) operation, where two or more transmitters carrying the same data operate on the same frequency. In such cases the signals from each transmitter in the SFN needs to be accurately time-aligned, which is done by sync information in the stream and timing at each transmitter referenced to GPS.

اطلاعات اضافی

اطلاعات اضافی

سیستم ریسیور
خروجی HDMI دارد
کیفیت تصویر HD دارد
کابل HDMI دارد
قابلیت ضبط دارد
درگاه USB دارد
قابلیت نمایش عکس ندارد
قابلیت تصویر در تصویر ندارد
نمایشگر شماره کانال یا ساعت دارد
بازی دارد
خروجی صدای دیجیتال SPDIF دارد
تله تکست دارد
قابلیت جستجوی خودکار و دستی کانال ها دارد
دستگاه ریموت کنترل دارد
تولید داخل
ساخت ایران
سایر ویژگی ها HDMI 1080p خروجی با کیفیت بالا
و بسیاری از فرمت های دیگر DIVX, MP3, MP4, JPEG, AVI پشتیبانی از
USB 2.0 درگاه پر سرعت
بر روی حافظه فلش یا هارد اکسترنال (PVR) قابلیت برنامه ریزی ضبط برنامه ها
نمایش پیغام ها و دستورات به زبان های مختلف
منوی کام
تایمر دارد
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