High-Definition Multimedia Interface (HDMI) for Pure Digital Delivery
All the Onkyo A/V receivers released in 2007 incorporate HDMI, enabling a pure, all-digital 1080p video signal to be sent through one connection.Those with the latest version of HDMI (version 1.3a) become powerful control centers for high-definition media. Even multichannel audio—including the studio master quality of the latest Dolby® Digital and DTS® formats (see glossary for definitions)—can be digitally received and
processed for up to five channels. HDMI 1.3a will also bring you greater bandwidth, Deep Color™, lip-sync correction and high frame rates.
HQV Reon-VX Chip for High-Performance Video Processing
Representing the most sophisticated video processing to be seen in home theater components, the HQV Reon-VX chip provides the ultimate support for standard definition and high-definition deinterlacing; 1080p reconstruction of film sources; filtering of jaggies and artifacts; and the reduction of random, “mosquito” and block (codec) noise. HQV Reon-VX also enables color region enhancement and the rendering of more than one billion colors.
Standard chips process pixels in blocks, | HQV chips process pixels individually, |
creating unwanted artifacts. | for enhanced pixel accuracy. |
Images scaled by Reon-VX contain 80% new pixels to augment the original video data.
1080p Video Upscaling and Analog Signal Upconversion
The TX-NR905 and TX-SR875 upscale the resolution of video signals all the way to 1080p, to enable a single HDMI cable connection to a high-definition display. Almost all Onkyo A/V receivers will upconvert video signals for output via either HDMI or component video.
Audyssey Technologies for Room Acoustics Correction
Onkyo A/V receivers use Audyssey’s MultEQ® XT or 2EQ™ to counter distortion in dedicated home
theaters. Both solutions focus on frequency response and time domain (where most of the problems lie) across the entire listening area.The results are immediately obvious—a clear, well-balanced and natural sound.
Sound stage is diffuse without Audyssey technologies. | Audyssey technologies create a clearer sound stage. |
Fresh Approach to Internal Construction and Amplification Design
The TX-NR905,TX-SR875 and TX-SR805 have been designed so the power amplifier block and the pre- amplifier coexist, but are perfectly isolated. Also, the power supply parts of the left and right stages of each channel are separated.The same receivers use a dual push-pull amplification design with different
transistors on each channel to separately amplify the positive and negative halves of the waveform.The whole design works to realize a highly efficient drive capability.
Dual “Push-Pull” Amplification Design with Three-Stage Inverted Darlington Circuitry
Dual push-pull amplification circuitry uses different transistors on each channel to separately amplify the positive and negative halves of the waveform.This circuitry has been shown to improve the efficiency of the relevant A/V receivers. Meanwhile, three-stage inverted Darlington circuitry helps reduce distortion.
Harnessing Power for Audio Performance
Onkyo’s High Current Power Supply (H.C.P.S.) concept is based around power transformers with the capability to respond to the wide dynamics of home theater. In the case of the TX-NR905, a massive toroidal transformer provides
efficiency and radiates less noise into the surrounding circuitry, while two separate transformers cater specifically to audio
and video processing.You’ll also find two quality capacitors (operating at up to 18,000 microfarads) that store the charge demanded from an effective power supply.
Vector Linear Shaping Circuitry (VLSC™)
Onkyo’s VLSC employs a unique digital- to-analog conversion circuit to mitigate the effect of signal noise. Data is converted between discrete sampling points, which are then joined with analog vectors in real-time to produce a smooth output wave form.The result—a noiseless, smooth analog signal based on the digital source.
Wide Range Amplifier Technology (WRAT) Providing Amplification Backbone
The cornerstone of any Onkyo A/V receiver, WRAT supports high-quality audio reproduction of the latest high-definition A/V
formats. It comprises three key components: (1) A low negative-feedback design for cleaner audio across the frequency range; (2) Closed ground-loop circuits to cancel individual circuit noise and keep the ground potential free of distortion; and (3) A high instantaneous-current capability to handle speaker reflex energy and impedance fluctuations.
