About Linear Acoustic
Linear Acoustic è l'azienda leader fra quelle che si occupano del controllo del rumore nei canali audio, upmixing e soluzioni di distribuzione per la televisione digitale. La società progetta e produce l'AERO ™ , che elabora soluzioni per il controllo del volume e del rumore, e2 ™ (e-squared) che elabora il ritorno audio e la sua distribuzione, e MetaMax ™ per la trasformazione dei prodotti e le licenze delle tecnologie per i partner OEM.
L'azienda è attivamente coinvolta nella creazione di norme e pratiche come membro dell' ATSC e partecipando a diversi gruppi che si occupano di normative internazionali.
E' un'azienda che sostiene il SMPTE (Society of Motion Picture and Television Engineers), ed è un membro dello Sports Video Group.
Linear Acoustic ha fornito il proprio UPMAX: neo ™ 5.1, upmixer e servizi tecnici, alla NBC per la copertura televisiva dei Giochi olimpichi di Pechino del 2008 ed è orgogliosa di aver fornito nuove tecnologie e servizi in occasione dei Giochi invernali di Vancouver 2010.
Linear Acoustic è un membro del Telos Group al fianco di Omnia e Axia.
Linear Acoustic is the leading authority in multichannel loudness control, upmixing, and distribution solutions for digital television. The company designs and manufactures the AERO™ range of audio processing and loudness control solutions, UPMAX® upmixing and downmixing solutions, the LQ-1000™ Loudness Quality Monitor, and MetaMAX™ metadata processing products. The company is actively involved in standards and practices creation as a member of the ATSC (Advanced Television Systems Committee) and as a sustaining member of SMPTE (Society of Motion Picture and Television Engineers). Linear Acoustic is proud to be a premier member of the Sports Video Group and is one of the founding members of its DTV Audio Group.
Inconsistent DTV audio loudness, or the so-called “loud commercial problem” is the number one complaint of television viewers and it is driving them away. Are you delivering the best sounding audio possible? If the answer is no, do you have time to manage the problem?
The Linear Acoustic AERO.air is the answer.
Engineered on the foundation of the company’s supremely successful first and second generation digital television audio processors, the third-generation AERO.air enables broadcasters to deliver compelling 5.1-channel surround sound while saving time,money, and space. The AERO.air also represents the world’s first TV audio processor to feature built-in Dolby® Digital (AC-3) encoding.
Inconsistent DTV audio loudness, the leading complaint of television viewers, is solved easily by the Linear Acoustic AERO.one™ DTV audio/loudness manager. This third generation audio processor offers broadcasters the simplest and most cost-effective solution for guarding against loudness shifts and loss of surround sound available today. Built-in loudness control, metadata control, and optional transmission encoding make
AERO.one an ideal solution for affiliate stations seeking to match local and network content and thus deliver a seamless surround-sound experience for their viewers.
Audio for mobile DTV presents new challenges. The dynamic range “comfort zone” used for mixing television audio for viewing on stereo or surround in-the-home televisions is far too wide for comfortable listening on typical earbuds or tiny speakers. Background noise in many environments will define a relatively high loudness floor — if the volume is increased for acceptable intelligibility on soft passages, loud passages run the risk of causing hearing damage.
The AERO.mobile™ employs newly developed psychoacoustic processing that enables content to remain audible in noisy environments on small mobile devices.
Accepting mono, stereo, or Dolby® 5.1-channel station audio, the unit includes all tools a broadcaster needs to deliver the most satisfying experience appropriate for widely varying individual listening environments.
The AERO.qc allows users to fix loudness problems automatically and in real time as audio enters the plant and is fed into the ingest server. This ingest quality control system from Linear Acoustic provides all of the tools necessary to get audio loudness right. The AERO.qc couples the ITU BS.1770 loudness-measurement specification with proprietary signal evaluation techniques to evaluate content and make adjustments. Operator intervention can range from full control of measurement and audio adjustment to highly automated processing that requires little oversight. Front-panel metering offers instant go/no-go feedback and precise loudness adjustment. Options include Dolby® E/AC-3 decoding, additional advanced production upmixing algorithms, AERO-style multiband loudness and dynamic range control, metadata display and monitoring, multichannel analog output with speaker EQ, and HD/SD-SDI input and output. A hardware remote volume and speaker control is available separately.
The LAMBDA displays both audio and metadata, and allows simulation of metadata effects to provide accurate monitoring. The base model includes standard features like AES and HD/SD-SDI inputs, ITU-R BS.1770 loudness measurement, and a premium acoustically tuned speaker system with digital crossovers and bi-amplification, full-time 2-channel LtRt or LoRo downmix via AES and balanced analog outputs, AES outputs of decoded and/or de-embedded audio channels, and a powerful front panel headphone output. Options include Dolby Digital (AC-3)/Dolby E decoding, DVB-ASI input, and dual power supplies.
Unique front-panel controls allow quick stepping through any channel, channel pair, or downmix.
Numerous presets can be created, saved and quickly recalled for different monitoring tasks. The display
features metering of eight audio channels plus numeric loudness and metadata indication. In addition to a numerical readout, a thin line indicating measured loudness "floats" over audio metering allowing quick verification of program loudness.
The LAMBDA-II displays both audio and metadata, and allows simulation of metadata effects to provide accurate monitoring. The base model includes standard features like AES and HD/SD-SDI inputs, ITU-RBS.1770 loudness measurement, and a premium acoustically tuned speaker system with digital crossovers and bi-amplification, full-time 2-channel LtRt or LoRo downmix via AES and balanced analog outputs, AES outputs of decoded and/or de-embedded audio channels, and a powerful front panel headphone output.
Options include Dolby Digital (AC-3)/Dolby E decoding, DVB-ASI input, and dual power supplies.
Unique front-panel controls allow quick stepping through any channel, channel pair, or downmix. Numerous presets can be created, saved and quickly recalled for different monitoring tasks. The display features metering of eight audio channels plus numeric loudness and metadata indication.
The LQ-1000 provides comprehensive loudness and peak level metering of up to eight channels of 5.1 surround and/or stereo AES or SDI audio per industry-standard ITU-R BS.1770, a crucial requirement for mixing and transmitting in compliance with ATSC Recommended Practice A/85.
The LQ-1000 evolved from extensive field experience with mixers and broadcasters during post production and high-profile live events. Joining the recently introduced Linear Acoustic AERO.qc, the LQ-1000 is also a 2RU device that shares the same clear at-a-glance display of all critical parameters on a large color OLED display. The LQ-1000 offers metering in a simple cost-effective package for studio mixing and plant-wide monitoring, while the AERO.qc provides metering, loudness correction and upmixing; both are ideal for ingest and live sports event metering and control. Deploying the LQ-1000 and AERO.qc throughout a facility maintains a common user interface and display, improving consistency and reducing operational errors.
Mixing to a loudness standard while maintaining production values requires much more than looking at a simple LKFS number. In the LQ-1000, current loudness, target loudness and peak level are clearly indicated with large numbers. In addition, loudness and peak level are displayed simultaneously on a familiar bar graph display. Thumbnail input meters confirm signal presence and level on all channels, and a histogram shows loudness over the duration of the program. Color is used to display the loudness comfort zone: green if within target, blue if too quiet, yellow if getting loud and red if too loud.
Based on the original UPMAX 2251, the 1RU UPMAX offers a stable and trusted algorithm in a cost- and space-efficient package, perfect for remote OB trucks. The upmixed output is completely downmix compatible; the downmixed result is nearly indistinguishable from the original two-channel input.
Upmixing can be controlled via the front panel, GPI inputs, or metadata from serial or VANC (SDI) sources applied to the unit. A bright LED display, rotary encoder, and four control keys provide straightforward menu navigation and function adjustment. Dual redundant auto-ranging power supplies are standard. Bypass relays are provided for trouble-free operation in transmission critical environments.
UPMAX also includes a utility encoder that accepts 5.1 channels and produces a two-channel LoRo or LtRt output. This encoder can be independent or it can be fed by the same channels applied to the upmixer.
Optional HD/SD-SDI I/O is available, allowing access to all 16 embedded audio channels. Audio can be processed or passed without modification from any embedded input pair to any embedded output pair, allowing utility channel pair shuffling.