System: Windows 1 1
Hevc is H265 code, just as Avc is H264 code. Compared with H264, H265 has clearer effect and higher compression ratio. At the same bit rate, its video effect is better. Under the same video effect, its bit rate is only half that of H264. H265 is a new video coding standard formulated by ITU-TVCEG after H264. The H265 standard revolves around the existing video coding standard H264, retaining some original technologies and improving some related technologies.
At present, Hevc coding has not been generally supported, because its encoding and decoding need to consume more cpu than H264, so not all players can support its decoding. There are some Android boxes supporting H265 decoding in the market, but the compatibility is usually not very good, because H265 has just begun to spread.
The biggest advantage of H.264 is its high data compression rate. Under the same picture quality, the compression ratio of H.264 is more than twice that of MPEG-2, and 1.5 ~ 2 times that of MPEG-4. For example, if the original file size is 88GB, it will become 3.5GB after being compressed by MPEG-2 compression standard, and the compression ratio will be 25∶ 1, while it will become 879MB after being compressed by H.264 compression standard. From 88GB to 879MB, the compression ratio of H.264 will reach an astonishing 102∶ 1. Low bit rate plays an important role in the high compression of H.264. Compared with compression technologies such as MPEG-2 and MPEG-4ASP, H.264 compression technology will greatly save users' download time and data traffic costs. In particular, H.264 has high compression ratio and high quality smooth images. Because of this, the video data compressed by H.264 needs less bandwidth and is more economical in the process of network transmission.