Transmissão
Netcasting é mais uma vez a fazer manchetes em publicações de negócios. Graças em parte ao fluxo contínuo permitiu-dispositivos 3GPP, alguns analistas veem como Netcasting suplantando a radiodifusão, porque Netcasting oferece um número virtualmente ilimitado de formatos de programação, e agora é untethered.
Até agora, a maioria do público tem associado netcasts com baixa qualidade, devido em parte aos codecs inferiores, como o Windows Media Audio. Há uma enorme diferença entre a qualidade de áudio de uma transmissão FM típico e um fluxo de 32 kbps WMA estéreo. A FM soa gorducho, enquanto o fluxo WMA soa como ele está debaixo d'água e arrozais. Na verdade, a única razão pela qual muitas netcasters ter comprometido em WMA é que a Microsoft usou seu poder de monopólio para embalar um jogador WMA em cada cópia do Windows ®.
Há uma maneira melhor, e é baseado em padrões abertos em todo o mundo. MPEG-4 HE-AAC v2 (também conhecido pelo seu nome comercial de aacPlus ® v2) proporciona maior qualidade de áudio em larguras de banda mais baixas do que qualquer outra tecnologia de codec de áudio disponíveis atualmente. Isso economiza custos operacionais, melhorando a qualidade de áudio e confiabilidade stream. aacPlus v2 proporciona qualidade de áudio extremamente estável ao longo de um intervalo de taxa de bits de largura, tornando-se a primeira escolha para todos os campos de aplicação em música móvel, radiodifusão digital, e da Internet, incluindo podcasting. Em testes de audição duplo-cegos rigorosos realizados pelo 3GPP (3rd Generation Partnership Project), aacPlus v2 provou a sua superioridade aos seus concorrentes, mesmo em taxas de bits tão baixas como 18 kbps. Assim, streaming móvel 3GPP padronizou o codec aacPlus. Surpreendentemente, algumas operadoras de telefonia móvel não são baseados em padrões, em vez empregando sistemas fechados usando soluções de streaming da Microsoft com muito má qualidade de áudio e vídeo.
v1 aacPlus (uma versão do aacPlus sem Parametric Stereo) foi avaliado em vários testes terceiro partido por MPEG, a União Europeia de Radiodifusão, e Digital Radio Mondiale. aacPlus v1 superou todos os outros codecs na competição. O "teste de audição subjetiva EBU em baixa taxa de bits codecs de áudio" full estudo pode ser baixado em: http://www.ebu.ch/CMSimages/en/tec_doc_t3296_tcm6-10497.pdf
A família de Orban Opticodec-PC de streaming de arquivos e codificadores de usar baseados em padrões, genuínos codificação AAC / aacPlus codecs v2 Technologies. A família Opticodec-PC é versátil, permitindo-lhe transmitir ou baixar para os jogadores livres amplamente disponíveis, como Winamp (5.05 e superior) e RealPlayer (versão 10 ou superior). Opticodec-PC 1010 PE (Professional Edition) suporta 3GPP streaming para dispositivos móveis. Todas as versões de apoio Opticodec-PC HTTP e servidores baseados em RTP, incluindo o servidor da Apple Darwin livre, Real / Helix, SHOUTcast ® / Icecast2 e Ultravox ® 3. Todas as versões do 1010 de streaming codificador apresentam confiável auto-reconectar em caso de interrupção de rede e de recursos robustos, implementação livre de problemas de metadados (como artista e título de informação). A família Opticodec-PC é um software profissional, de força industrial adequado para qualquer coisa de NetCast área de trabalho de um indivíduo múltiplo streaming uma grande organização para milhares de jogadores cliente.
O codec é metade da equação. A outra metade é de processamento de áudio antes do codec. As emissoras foram acostumados a processamento de áudio para AM e FM com transmissão processadores de áudio de transmissão como a série Optimod de Orban. Optimod-PC é um processador de áudio Orban qualidade em uma placa de som PCI. Ele atinge vários objetivos importantes em um NetCast. Ele realiza a compressão de faixa dinâmica para adaptar o áudio para ambientes sonoros típicos como automóveis, casas e lugares públicos, e garante uma apresentação consistente. No rádio, material de programa a partir de diferentes produtores são constantemente justapostos. No entanto, as emissoras mais bem sucedidos concordam que alcançar um "grande mercado" imagem sonora requer uma coerência global de som textura e equilíbrio espectral de fonte para fonte. Optimod-PC traz essa consistência ao seu NetCast.
As audiências estão migrando para a Internet para programação alternativa. Eles merecem uma melhor qualidade de áudio MP3 ou WMA que pode entregar a taxas de bits acessíveis. Usados em conjunto, Opticodec-PC e PC-Optimod trazer qualidade de transmissão FM para o NetCast. Ao contrário de streaming de vídeo, streaming de áudio é agora de forma confiável capaz de qualidade de transmissão, permitindo ao usuário uma experiência positiva. Isto dá ao seu público uma razão convincente para ouvir e, mais importante, para voltar novamente e novamente.
BAIXAR
Optimod-PC 1101
Optimod 8500HD-Class Stereo Processing, PCI Card
Microsoft Windows® Audio Processing Card for Professional Broadcasters/Netcasters
The Orban Optimod-PC 1101 professional Microsoft Windows audio processing card for PCI bus systems offers dedicated, broadcast-quality digital signal processing on-board for audio processing, mixing, and routing. Optimod-PC processing is more reliable than software-based processors that run native on the computer's CPU because the operating system can never starve Optimod-PC's processor or mixer for processing cycles. This allows more instances of an encoding application to run glitch-free on the computer's CPU, which provides higher reliability and lower operating costs because fewer CPUs are required for large operations.
Optimod-PC works great for both live streaming and on-demand programming. Its three on-board Freescale DSP56367 DSP chips provide a loud, consistent sound by performing stereo enhancement, automatic gain control (AGC), equalization, multiband gain control, peak-level control, and subjective loudness control. Optimod-PC boasts professional AES/EBU digital inputs and outputs, plus balanced analog inputs and outputs that can operate at professional +4dBu reference levels while resisting pickup of hum and noise.
Optimod-PC's audio driver allows it to appear as two standard sound devices to the computer's operating system. With one Optimod-PC, netcasters can replace selected content (such as commercials in a program originally created for radio broadcast) and inject watermark encoding for ratings. This approach maintains the same audio processing path on both program and inserted audio, delivering a polished, consistent sound while eliminating the number one listener complaint: loud commercials.
Optimod-PC audio processing works with all digital transmission media and channels. It tailors your audio signal to help you compete in audio netcasting, HD Radio (both primary and multicast digital channels), DAB, DRM, and other dedicated digital radio services, FMExtra and other digital subcarriers, mastering, audio production, and many others.
Without Optimod-PC processing, audio can sound dull, thin, or inconsistent in any combination. Optimod-PC's multiband processing automatically levels and re-equalizes its input to the "major-market" standards expected by the mass audience. It also helps overcome background noise in mobile listening environments.
Optimod processing algorithms simultaneously control audio gain and peaks, artistically, musically, and naturally, to give the illusion that processing is not taking place. Optimod algorithms intelligently adapt themselves to the input program material. Once Optimod-PC is tuned for the sound texture required for the broadcast or netcast format (which is made easy by the many format-specific presets), it will provide excellent consistency regardless of the level or texture of the original program material. Its automatic gain control and equalization achieve a consistent sound, while accurate peak control maximizes loudness. Booming bass is tightened; weak, thin bass is brought up; highs are always present and consistent in level.
Professional-grade netcasting requires audio processing similar to FM broadcast (although there are some important differences in the peak limiting because of the different characteristics of the pre-emphasized FM channel and the perceptually coded netcasting channel). Your listeners deserve to get the best quality and consistency you can provide. Combining Orban Optimod-PC with Orban Opticodec-PC Streaming Encoder will deliver stunning sonic results for Internet streams that can be at least as good as or better than HD or satellite radio.
Orban's PreCode technology manipulates several aspects of the audio to minimize artifacts caused by low bitrate codecs, ensuring consistent loudness and texture from one source to the next. PreCode includes special audio band detection algorithms that are energy and spectrum aware. This can improve codec performance on some codecs by reducing audio processing induced codec artifacts, even with program material that has been preprocessed by other processing than Optimod. There are several factory presets tuned specifically for low performance, low bitrate codecs.
Optimod-PC is also an excellent mastering processor, offering soft knee multiband compression with knee and ratio controls available separately for each band. This is followed by a low-IM look-ahead limiter that can typically achieve 12 dB of gain reduction before it produces objectionable artifacts (this limiter is exceptionally loud and clean).
Digital mixing is crucially important to a netcaster who needs to control commercial content and insertion. Unlike most sound cards, Optimod-PC lets you mix an analog source, two digital sources, and two Wave sources. For example, you could run a playout system on your computer while using the three hardware inputs for a live microphone feed, commercial insert, and network insert. Or you could run the commercial insert playout software on the same computer as the main playout system, using Optimod-PC's second Wave input to separately route the outputs of the two playout systems to the card. In most cases, an external mixer isn't needed, making Optimod-PC a more economical system solution than a low-priced sound card combined with a bunch of external hardware. This is also perfect for podcast production.
Optimod-PC comes with over 20 great-sounding presets that make it easy to create a sonic texture that's just right for your target audience. If you want to customize a preset, you can start with an easy LESS-MORE control, and, if that's not enough, tweak over 50 parameters to hone your sound to perfection. Optimod-PC's deep interface will never hold you back as your processing expertise increases, yet its carefully crafted design insulates you from the details if you need great sound right now.
Orban Optimod-PC 1101 Main Features:
• Dramatically improve audio consistency dynamically with that world-renowned Optimod sound
• Most universal professional audio card with features not found anywhere else
• Prevents the top listener complaints: loudness variation and program inconsistency
• Now two sound cards in one, for professional content/commercial insertion systems, and watermark encoding
• Dedicated onboard DSP saves host computer CPU cycles for more streaming encoders and ensures against audio gaps or dropouts
• Network control of audio routing, mixing, and processing
• CBS Loudness Controller controls subjective loudness to ATSC A/85:2011 and EBU R 128 standards
Optimod-PC's audio driver allows it to appear as two standard sound devices to the computer's operating system. With one Optimod-PC, netcasters can replace selected content (such as commercials in a program originally created for radio broadcast) and inject watermark encoding for ratings. This approach maintains the same audio processing path on both program and inserted audio, delivering a polished, consistent sound while eliminating the number one listener complaint: loud commercials.
Optimod-PC audio processing works with all digital transmission media and channels. It tailors your audio signal to help you compete in audio netcasting, HD Radio (both primary and multicast digital channels), DAB, DRM, and other dedicated digital radio services, FMExtra and other digital subcarriers, mastering, audio production, and many others.
Without Optimod-PC processing, audio can sound dull, thin, or inconsistent in any combination. Optimod-PC's multiband processing automatically levels and re-equalizes its input to the "major-market" standards expected by the mass audience. It also helps overcome background noise in mobile listening environments.
Optimod processing algorithms simultaneously control audio gain and peaks, artistically, musically, and naturally, to give the illusion that processing is not taking place. Optimod algorithms intelligently adapt themselves to the input program material. Once Optimod-PC is tuned for the sound texture required for the broadcast or netcast format (which is made easy by the many format-specific presets), it will provide excellent consistency regardless of the level or texture of the original program material. Its automatic gain control and equalization achieve a consistent sound, while accurate peak control maximizes loudness. Booming bass is tightened; weak, thin bass is brought up; highs are always present and consistent in level.
Professional-grade netcasting requires audio processing similar to FM broadcast (although there are some important differences in the peak limiting because of the different characteristics of the pre-emphasized FM channel and the perceptually coded netcasting channel). Your listeners deserve to get the best quality and consistency you can provide. Combining Orban Optimod-PC with Orban Opticodec-PC Streaming Encoder will deliver stunning sonic results for Internet streams that can be at least as good as or better than HD or satellite radio.
Orban's PreCode technology manipulates several aspects of the audio to minimize artifacts caused by low bitrate codecs, ensuring consistent loudness and texture from one source to the next. PreCode includes special audio band detection algorithms that are energy and spectrum aware. This can improve codec performance on some codecs by reducing audio processing induced codec artifacts, even with program material that has been preprocessed by other processing than Optimod. There are several factory presets tuned specifically for low performance, low bitrate codecs.
Optimod-PC is also an excellent mastering processor, offering soft knee multiband compression with knee and ratio controls available separately for each band. This is followed by a low-IM look-ahead limiter that can typically achieve 12 dB of gain reduction before it produces objectionable artifacts (this limiter is exceptionally loud and clean).
Digital mixing is crucially important to a netcaster who needs to control commercial content and insertion. Unlike most sound cards, Optimod-PC lets you mix an analog source, two digital sources, and two Wave sources. For example, you could run a playout system on your computer while using the three hardware inputs for a live microphone feed, commercial insert, and network insert. Or you could run the commercial insert playout software on the same computer as the main playout system, using Optimod-PC's second Wave input to separately route the outputs of the two playout systems to the card. In most cases, an external mixer isn't needed, making Optimod-PC a more economical system solution than a low-priced sound card combined with a bunch of external hardware. This is also perfect for podcast production.
Optimod-PC comes with over 20 great-sounding presets that make it easy to create a sonic texture that's just right for your target audience. If you want to customize a preset, you can start with an easy LESS-MORE control, and, if that's not enough, tweak over 50 parameters to hone your sound to perfection. Optimod-PC's deep interface will never hold you back as your processing expertise increases, yet its carefully crafted design insulates you from the details if you need great sound right now.
Orban Optimod-PC 1101 Main Features:
• Dramatically improve audio consistency dynamically with that world-renowned Optimod sound
• Most universal professional audio card with features not found anywhere else
• Prevents the top listener complaints: loudness variation and program inconsistency
• Now two sound cards in one, for professional content/commercial insertion systems, and watermark encoding
• Dedicated onboard DSP saves host computer CPU cycles for more streaming encoders and ensures against audio gaps or dropouts
• Network control of audio routing, mixing, and processing
• CBS Loudness Controller controls subjective loudness to ATSC A/85:2011 and EBU R 128 standards
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