Digital broadcasting signal displaying system and signal processing method thereof
AssigneeSkymedi Corporation
InventorsChin-Cheng Kao, Ching-Yao Yang, Chih-Ming Lin
Life of this patent
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Abstract
A digital broadcasting signal processing method for processing a multimedia stream by a set-top box is disclosed. A USB request command set is pre-defined in a digital signal receiving unit to support the set-top box. The digital signal receiving unit transmits data with the set-top box and controls the signal quality of the data transmission according to the USB request commands transmitted by the set-top box while the digital signal receiving unit connected with the set-top box via USB.
Claims22
A digital broadcasting signal displaying system, comprising:
- a digital signal receiving unit, comprising:
- an antenna module configured to receive a digital broadcasting signal;
- a demodulator configured to demodulate the digital broadcasting signal to generate a transport stream;
- and
- a USB transport device configured to receive USB request commands to output the transport stream;
- and
- a set-top box coupled to the digital signal receiving unit via USB interface to process and display the transport stream, and the set-top box comprises:
- a USB control unit configured to transmit USB request commands to the USB transport device and request the digital signal receiving unit to transmit the transport stream to the set-top box, wherein the USB control unit is configured to issue USB request commands to amend the analog-to-digital conversion gain of the digital signal receiving unit according to a signal-to-noise ratio of the digital signal receiving unit.
A digital broadcasting signal processing method for displaying a multimedia stream by a set-top box, the method comprising:
- connecting a digital signal receiving unit to the set-top box via a USB transport device;
- initializing the set-top box and the digital signal receiving unit via the USB transport device;
- receiving a digital broadcasting signal by the digital signal receiving unit;
- and
- the set-top box issuing USB request commands to the digital signal receiving unit, so as to request transmission of data stored in the digital signal receiving unit to the set-top box, wherein the set-top box transmits USB request commands to amend the analog-to-digital conversion gain of the digital signal receiving unit according to a signal-to-noise ratio transmitted from the digital signal receiving unit.
A digital signal receiving unit for a digital broadcasting signal displaying system, the digital signal receiving unit being coupled to a set-top box via a USB interface, and comprising:
- an antenna module configured to receive a digital broadcasting signal;
- a receiver configured to receive the digital broadcasting signal by the antenna module;
- a demodulator coupled to the receiver and configured to demodulate the digital broadcasting signal to generate a transport stream;
- and
- a USB transport device having USB request commands for supporting the set-top box, the USB transport device being configured to transmit the transport stream to the set-top box and to amend the analog-to-digital conversion gain of the digital signal receiving unit according to a signal-to-noise ratio of the digital signal receiving unit after receiving USB request commands.
Dependencies are inferred from the claim text.