Abstract: This invention relates to an information delivery system and method, an information transmission apparatus and method, and an information receiving apparatus and method for delivering a digital multi-channel service signal through a satellite and a cable network. A QPSK demodulation circuit demodulates an inputted TS and outputs it to an error correction circuit. The error correction circuit corrects the inputted signal and outputs it to a network information (NIT) conversion circuit. The NIT conversion circuit replaces the NIT for CS waves with NIT for cable TV and outputs it to a QAM demodulation circuit. The QAM demodulation circuit demodulates the inputted signal and pouts it to a frequency conversion circuit. The frequency conversion circuit converts the frequency of the inputted signal into a predetermined value and outputs the signal to a signal mixer.

Abstract: A digital broadcast program broadcast with a first network is transmitted to a second network. A tuner 41 selects digital broadcast signal having a predetermined transmission frequency and ECC decoder 43 obtains MPEG2 TS packet S3 as the digital broadcast data on the digital satellite broadcasting. An NIT detecting circuit 44 detects NIT from the MPEG2 TS packet S3 and a control unit 31 changes the NIT to obtain a table NITb applicable to CATV. A NIT substitution circuit 48 detects NIT from the MPEG2 TS packet S3 and substitutes table the NITb for the NIT to obtain MPEG2 TS packet S4 as the digital broadcast data on the CATV. Then, an error correct code is added to the MPEG2 TS packet S4 and the added packet S4 is modulated. Then, modulated one is frequency-converted to obtain digital broadcast signal BS-1 having a predetermined transmission frequency for the CATV.

Abstract: A tractor cabin having struts, a top framework, an air conditioner mounted on the top framework, and a ceiling assembly covering an entire ceiling area of the cabin. In order to optimize air conditioned flows, the ceiling assembly includes outlet vents in a front region thereof for delivering defrosting air flows, outlet vents in lateral sides thereof for delivering air flows for the driver, an inside air intake vent in a rear portion thereof inside the cabin, and an outside air intake vent rearwardly and outwardly of the cabin. The ceiling assembly further includes an overhead console box having an air conditioning control unit and other elements. The console box is disposed such that its lower end is on or above a straight line extending from the driver's eye level to the top edge of a windshield to provide the driver with an unobstructed forward view.