Broadcast receiving apparatus and transmission method of digital broadcast modulation wave
AssigneeMaxell, Ltd.
InventorsHitoshi AKIYAMA, Kazuhiko YOSHIZAWA, Takuya SHIMIZU, Yasunobu HASHIMOTO
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Abstract
A broadcast receiving apparatus is configured to include: a tuner configured to receive a transmission wave, information regarding an injection level being stored in the transmission wave; and a controller. The controller is configured to identify that a rescanning process is required by using the information regarding the injection level contained in the transmission wave received by the tuner, the rescanning process being a setting process for receiving broadcast by the tuner.
Claims13
A broadcast receiving apparatus comprising:
- a tuner configured to receive a transmission wave, information regarding an injection level being stored in the transmission wave;
- and
- a controller,
- wherein the controller is configured to identify that a rescanning process is required by using the information regarding the injection level contained in the transmission wave received by the tuner, the rescanning process being a setting process for receiving broadcast by the tuner.
A transmission method for a digital broadcasting modulation wave, the transmission method comprising:
- a transmitting step of transmitting a synthetic wave obtained by synthesizing an upper layer modulation wave and a lower layer modulation wave with a same frequency band, transmission electric powers of the upper layer modulation wave and the lower layer modulation wave being different from each other;
- a transmission electric power changing step of changing a difference between the transmission electric powers of the upper layer modulation wave and the lower layer modulation wave;
- and
- an information transmitting step of transmitting information regarding the difference between the transmission electric powers so as to be contained in either the upper layer modulation wave or the lower layer modulation wave.
A transmission method for a digital broadcasting modulation wave, the transmission method comprising:
- a transmitting step of transmitting a synthetic wave obtained by synthesizing an upper layer modulation wave and a lower layer modulation wave with a same frequency band, transmission electric powers of the upper layer modulation wave and the lower layer modulation wave being different from each other;
- a transmission electric power changing step of changing a difference between the transmission electric powers of the upper layer modulation wave and the lower layer modulation wave;
- and
- an information transmitting step of transmitting information regarding the difference between the transmission electric powers so as to be contained in either the upper layer modulation wave or the lower layer modulation wave,
- wherein identification information indicating the difference between the transmission electric powers in a plurality of stages is contained in the information regarding the difference between the transmission electric powers, and
- wherein the stage indicated by the identification information irreversibly transitions by variation of the difference between the transmission electric powers in the transmission electric power changing step.
Dependencies are inferred from the claim text.