发明名称 |
METHOD AND APPARATUS FOR AUDIO AND VIDEO SYNCHRONIZING IN MPEG PLAYBACK SYSTEMS |
摘要 |
<p>A multimedia system including an audio/video decoder/decompresser for decoding/decompressing a compressed encoded audio/video data stream to generate video images for display and audio signals for audible reproduction. The multimedia system includes an integrated system and video decoder with an audio/video synchronization circuit for substantially synchronizing the display of video images with audio playback. An audio presentation time stamp (APTS) is detected in the compressed/coded audio data stream in the integrated system and video decoder and stored in a data latch. The compressed/coded audio data stream is fed to an audio decoder which decodes/decompresses the audio data and outputs and audio signal. The audio decoder detects when audio data corresponding to an APTS had been output and sets a corresponding flag. The flag indicates to the integrated system and video decoder that a corresponding audio segment had been decoded/decompressed and output. The integrated system and video decoder then synchronizes the video output with the audio output by repeating or skipping frames of video data.</p> |
申请公布号 |
EP0797893(A4) |
申请公布日期 |
2000.09.27 |
申请号 |
EP19950944049 |
申请日期 |
1995.12.14 |
申请人 |
CIRRUS LOGIC, INC. |
发明人 |
ROSENAU, MARK, A.;SARTAIN, DARYL;DAUM, DANIEL;ORT, JEFFREY, G. |
分类号 |
G06F3/16;G06F3/01;G06T9/00;G09G5/00;G09G5/18;G09G5/36;G09G5/393;G10K15/04;G11B20/00;G11B20/10;G11B27/10;G11B27/30;H04N5/775;H04N5/85;H04N7/04;H04N7/045;H04N7/26;H04N7/46;H04N7/50;H04N7/52;H04N9/804;H04N9/806;H04N9/82;H04N9/87;(IPC1-7):H04N7/12;H04N11/04;H04N11/02 |
主分类号 |
G06F3/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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