In addition, Presto Music and HDtracks are launching revamped music stores with OraStream's platform. 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 dela
y-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. The servers prioritise the bit stream truncation process to ensure optimal multi-channel distribution and similar high perceptual quality for both 16- and 24-bit depth recordings at intermediate bit-rates. This enables users to stream lossy audio as well as lossless and high-resolution audio music anywhere at anytime. With a good connection to a cloud-music service, they can choose to stream 16-bit, 44.1 kHz and any higher resolution up to 24-bit, 192 kHz audio quality on desktop personal computers and mobile devices. OraStream enables digital music services to operate existing lossy, like MP3 or AAC, and bit-for-bit lossless audio services off a single media file. Unlike existing digital music platforms, which depend on multiple encodes and audio profiles' storage to deliver different intermediate bitrates audio services, OraStream uses a single scalable audio (media) file to deliver lossy and lossless audio. This eliminates multiple encoding operations and duplicate media files, simplifies content preparation and distribution, which improves the operational efficiency of services.
