The emergence of personal computers, smartphones, tablet computers and cellular, wireless broadband and optical distribution networks has enabled numerous new multimedia applications (including lossless and high-resolution audio music services). Lossless and high-resolution audio streaming is delay-sensitive and rate-based. it has an intrinsic transmission rate and requires relatively constant bandwidth to deliver without quality-of-service issues. However, the Internet is a shared environment. Depending on the state of the network, the available bandwidth can vary in unpredictable and potentially wide fashion. To satisfy both of the above requirements and deliver high-fidelity audio without quality of service problems, a high degree of adaptability is required. This adaptability problem is traditionally addressed by multi-audio content transcoding and multi-audio media profile switching which are relatively complex and inefficient.
As a more efficient solution, OraStream uses an enhanced MPEG-4 Scalable Lossless (SLS) audio coding that transforms lossless audio into fine-grained, scalable layers and generates an embedded bitstream for fully scalable audio. When a user connects to our server, the user's network connection is monitored continuously in real-time. When a user's connection is fast, every bit-rate layer of the bit stream is delivered for lossless audio playback. When the connection is poorer, the server removes some layers to match the slower connection. A proprietary patented process produces multi-channel distribution and optimises perceptual audio quality at intermediate bit-rates.
OraStream enables next-generation streaming services based on 16/24-bit high res audio music. Unlike existing digital platforms, which depend on streaming multiple encoded audio profiles' at different quality bitrates, OraStream uses a single scalable (lossless) audio file. This simplifies content preparation, maintenance and improves supply chain efficiencies.
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