Connected accessory audio devices such as soundbars are often used in substitution of built in TV audio because of their superior hardware. In this paper a framework is introduced in which the audio hardware of the two devices can be utilized simultaneously in TVs where amenable hardware is available. In such a configuration audio tasks are additionally assigned to top firing TV loudspeakers allowing for vertical sound expansion. An audio rendering algorithm is utilized in which additional audio channels for high quality sound expansion are synthesized based on input and analysis of content. Listening tests reveal a preference for the expanded sound compared with a soundbar only reference.
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