Abstract: In a DVD video player with a built-in CD-R drive, until it reaches the state that the data of an optical disk can be reproduced, the output is switched into the reproduction output from a flash memory, a record medium that is quick to start reading. This makes it possible to develop user interfaces such as: voluntarily reproducing an audio information from the flash memory to add music sounds or sounds with special effects to the screen saver, in replacement of the optical disk drive that cannot read data during the screen saver being in operation or being in standby; reproducing the sounds with special effects; reproducing click sounds in response to a key input from the key or the remote control unit; and announcing to inform of the state to the user.

Abstract: A digital image and speech recording and reproducing apparatus is arranged to quickly and simply retrieve, classify, and erase a great deal of data for improving the operativity in small-sized equipment. The apparatus includes a recording and reproducing unit for a moving image signal, a recording and reproducing unit for a still image signal, a recording and reproducing unit for a digital speech signal operated in synchronous to the image, a display for displaying the image for said moving image signal or said still image signal, a recording condition recording unit for recording recording conditions containing data information about recorded data for distinguishing said moving image from said still image and recording time information for recording an image or a speech.

Abstract: A digital image and speech recording and reproducing apparatus is arranged to quickly and simply retrieve, classify, and erase a great deal of data for improving the operativity in small-sized equipment. The apparatus includes a recording and reproducing unit for a moving image signal, a recording and reproducing unit for a still image signal, a recording and reproducing unit for a digital speech signal operated in synchronous to the image, a display for displaying the image for said moving image signal or said still image signal, a recording condition recording unit for recording recording conditions containing data information about recorded data for distinguishing said moving image from said still image and recording time information for recording an image or a speech.

Abstract: In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a "wet wall" or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor. The apparatus includes a radially outwardly extending interior annular recess around an upper portion of the inner wall thereof and forming a part of said inner wall and plural means for tangentially injecting the recycled liquid into said recess.

Abstract: In a process for the thermal cracking of a heavy hydrocarbon in a cylindrical reactor, a portion of the content material in the reactor is taken out and injected back into the reactor according to a specific procedure to form a "wet wall" or liquid curtain on the inner peripheral wall of the reactor, thereby preventing coking in the reactor.

Abstract: An improved method for determining the liquid level in a petroleum thermal cracking reactor by injecting oil into the reactor at a predetermined rate not less than 5 cm/sec and measuring the liquid pressure at the point of injection and calculating the liquid level from the measured pressure.