Abstract: A recording and reproducing apparatus is characterized in that said apparatus has: inputting means for receiving a packet data which is based on IEEE 1394, and in which signal information for indicating copy right information of an AV data (hereinafter, referred to as EMI) is provided in a header of a packet according to IEEE 1394; and recording and reproducing means for recording and reproducing an AV data and the EMI which are held in the packet data received by said inputting means. Four kinds of EMI are used, and, when an AV data indicating allowance “copy one generation” among them is to be recorded, said recording and reproducing means performs recording while rewriting the EMI to EMI indicating “no more copy.

Abstract: According to the HAVi standard, a situation that a signal input from an input terminal of an AV apparatus is output from an output terminal of the same AV apparatus as it is or after its form is converted cannot be clearly shown. A controlling apparatus 82 controlling at least one controlled apparatus 30 and 75 based on an object-oriented model has a device object corresponding to the controlled apparatus 30 with a pass-through function having as a function element thereof a stream pass-through function to output a stream input from an input terminal from an output terminal as it is or after changing its form, in which a function object 42 corresponding to the pass-through function is provided.

Abstract: The data transmission system can substantially prohibit illegal copy of real data since the encryption key applied to transmitted data is changed depending on copy management information, thereby the real data being decrypted and recorded with a key different from the original key when the copy management information is tampered. Thus, the transmitted data can be further securely protected than in the prior art.

Abstract: A receiving control device has

Abstract: A GUI-equipped terminal apparatus which is connected to another terminal device through a network, and forms a distributed software environment, has

Abstract: An advertisement supplying method, characterized in that an area for recording advertisement data is crated in a large-capacity recording medium, advertisement data which are to be reproduced when an audience watch a program are recorded in said area in advance, and said large-capacity recording medium is thereafter provided.

Abstract: A gateway apparatus connected to a first network and a second network and for controlling the operation of an apparatus or a plurality of apparatuses of control objective connected to the first network depending on the instructions directed to the second network by an instructing apparatus connected to the first network for the apparatuses of control objective, the gateway apparatus has

Abstract: A parallel signal transmission system for transmitting parallel signals from a transmission unit to a reception unit via an optical fiber, at a low cost without spoiling their quality. The transmission unit converts received parallel signals into serial signals frame by frame, by means of a frame sync signal, and further converts the serial signals into direct current equilibrium signals which are either CMI codes or DMI codes. At the same time, the direct current equilibrium signals are multiplexed with the frame sync signal in accordance with the code ruling violation in order to drive a laser diode having a 0.78 .mu.m wavelength and output intensity-modulated optical signals to the optical transmission path. As the optical transmission path, a plastic clad fiber is used whose core diameter is 200 .mu.m or larger in order to agree with the laser diode having a 0.78 .mu.m wavelength.

Abstract: A light-receiving module includes: a pigtail optical fiber including a core portion for transmitting an optical signal and a cladding portion covering a side face of the core portion; an optical connector provided at a first end of the pigtail optical fiber for optically connecting a transmitting optical fiber with the end of the pigtail optical fiber; a light-receiving device having a light-receiving face for receiving the optical signal propagating through the core portion and for converting the optical signal into an electric signal; an optical coupling system for converging the optical signal emitted from a second end of the pigtail optical fiber onto the light-receiving face of the light-receiving device; and means for preventing light propagating through the cladding portion from reaching the light-receiving face of the light-receiving device so that the optical signal propagating through the core portion does not interfere with the light propagating through the cladding portion on the light-receiving f