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Control of a compressive (e.g. MPEG) encoder by a decoding device Disclosure Number: IPCOM000021085D
Publication Date: 2003-Dec-22
Document File: 1 page(s) / 105K

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The Prior Art Database



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Control of a compressive (e.g. MPEG) encoder by a decoding device

         The figure shows a conceptual drawing of a gateway device and a receiver. The gateway device is intended to receive audio and video signals and compress them where needed and transmits them over a wireless or wired link. The receiver is intended to receive the coded signal, and present it on a screen. The gateway has e.g. a hybrid tuner and demodulators, to receive both analog and digital signals. The digital signals are already compressed (e.g. MPEG), but the analog signals need to be compressed by an internal encoder. From the digital or analog signals one or more signals are selected, e.g. under control of the receiver. The receiver receives the one or more signals and subsequently decodes them by a HW or SW decoder. After the signal is decoded it is presented on the screen and the audio is presented on the loudspeakers.

         In normal situations the encoder has a fixed setting, under control of the processor in the gateway (a broadcasting situation). All parameters are set and controlled internally. It is however also possible to set the encoder under control of the receiver. Depending on the resources (bandwidth to memory, memory size, processor performance, wireless interface bandwidth) the receiver can set the parameters of the encoder. For instance, if the CPU has not enough performance it will set the parameters of the encoder such that it will be easier to decode (for instance only I and P frames...